Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, nhanh vi
qua tham » qua cham, qua than, qua thanh
tham doc » than doc, tham do, tham nuoc
thanh ve » hanh ve, thanh va, thanh vien
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
doc va » duoc va, hoc va, duc va
te cac » tu cac, ve cac, te cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ky lang xa hoi. hieu qua tham doc va ((thanh vi) OR (thanh ve)) ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky lang xa hoi. hieu qua tham doc va ((thanh vi) OR (thanh ve)) ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky lang xa hoi. hieu qua tham doc va ((thanh vi) OR (thanh ve)) ((cua tre) or (cuu tre))*".