trông thì nghệch nhưng rất khôn 
to look only dull but be actually clever [ trông ] : to look, appear, have the appearance of, -looking
[ thì ] : (1) time; (2) then, as for, however, in that case, certainly, for sure
[ nghệch ] : looking stupid, looking dull
[ nhưng ] : but, yet
[ rất ] : very, quite
[ khôn ] : wise, smart, clever
Most Common Compounds Set 1:
Most Common Compounds Set 2 :