Perhaps you should try some spelling variations:
ve triet » va trien, su triet
thanh vi » hanh vi, thanh va, thanh ve
sach thu » sach thue, sach thieu, sach tham
qua cham » qua hai, qua cac, va cham
hang mai » hoang mai, hang hai, lang mai
hang tai » hang va, dung tai
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
xuc va » duc va, tuc va, luc va
vi ve » va ve, gi ve, ve ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu ((hang mai) or (hang tai)) hoi. hieu qua cham ((xuc va) or (thuc va)) thanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((hang mai) OR (hang tai)) hoi. hieu qua cham ((xuc va) OR (thuc va)) thanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: su sach thu ((hang mai) or (hang tai)) hoi. hieu qua cham ((xuc va) or (thuc va)) thanh vi ve triet*.