Perhaps you should try some spelling variations:
hau treo » cau treo, cau theo, dau tren
danh hai » dang hai, lanh hai, manh hai
hieu van » hieu va, thien van, lieu va
hai hau » hai chau, dai hau, hai hai
truc va » thuc vat, trung va
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
nang ma » tang ma, sang ma, mang may
van lam » van nam
sach v » sach va, sach y, sach 2

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 v ((nang ma) or (nang cao)) hoi. hieu van lam ((thuc va) or (truc va)) danh hai hau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v ((nang ma) OR (nang cao)) hoi. hieu van lam ((thuc va) OR (truc va)) danh hai hau treo.
• Adding a wildcard symbol may retrieve word variants: su sach v ((nang ma) or (nang cao)) hoi. hieu van lam ((thuc va) or (truc va)) danh hai hau treo*.