Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
tang van » dang van, hoang van, trong van
thuoc va » thuoc ma, thuong va, thuoc tai
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
hanh ve » hanh vi, hanh va, hanh kem
cuu tre » cua tre, cau tren, cau treo
sach ly » sach y, sach lo, sach ty
qua nam » quan nam, cua nam, quang nam
ly tang » le tang, ly hang, ly vang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly tang van hoa. hieu qua nam ((thuoc va) or (thuc va)) ((thanh van) or (hanh ve)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly tang van hoa. hieu qua nam ((thuoc va) OR (thuc va)) ((thanh van) OR (hanh ve)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ly tang van hoa. hieu qua nam ((thuoc va) or (thuc va)) ((thanh van) or (hanh ve)) cuu tre*.