Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
truc va » thuc va, thuc vat, trung va
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
di cua » dai cua, doi cua, de cua
ac va » tac va, bac va, mac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang x) or (tang ma)) hoi. hieu van cam ((ac va) or (truc va)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang x) OR (tang ma)) hoi. hieu van cam ((ac va) OR (truc va)) hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang x) or (tang ma)) hoi. hieu van cam ((ac va) or (truc va)) hanh di cua tre*.