Perhaps you should try some spelling variations:
duoc tren » nuoc tren, thuoc tren, dung tren
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, sach tham
lang xa » lang ha, dang xay, lang van
lam xuc » cam xuc, lam duoc
dao thi » do thi, dan thi, dang thi
duc tre » duc tien
van lam » van nam
xuc ca » xuc cam, xuc cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach y) or (sach thu)) lang xa hoi. hieu van lam xuc ca dao thi ((duc tre) or (duoc tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach y) OR (sach thu)) lang xa hoi. hieu van lam xuc ca dao thi ((duc tre) OR (duoc tren)).
• Adding a wildcard symbol may retrieve word variants: thu ((sach y) or (sach thu)) lang xa hoi. hieu van lam xuc ca dao thi ((duc tre) or (duoc tren))*.