Perhaps you should try some spelling variations:
duoc tren » nuoc tren, thuoc tren, dung tren
hieu van » hieu va, thien van, lieu va
dinh thi » dinh tri
hoc sach » hoc sinh, hoc cac, hoc anh
van lam » van nam
sach ty » sach y, sach tu, sach thu
xuc cua » luc cua, tuc cua, uc cua
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
duc tre » duc tien
xuc ca » xuc cam

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

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