Perhaps you should try some spelling variations:
tang van » dang van, hoang van, trong van
tinh voi » trinh voi, tinh doi, binh voi
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
voi cua » hoi cua, doi cua, moi cua
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky ((tang van) or (nang ma)) hoi. hieu va cac ((xuc va) or (thuc va)) tinh voi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky ((tang van) OR (nang ma)) hoi. hieu va cac ((xuc va) OR (thuc va)) tinh voi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sanh ky ((tang van) or (nang ma)) hoi. hieu va cac ((xuc va) or (thuc va)) tinh voi cua tre*.