Perhaps you should try some spelling variations:
hanh trau » hanh tram, hanh trang, thanh tran
trau cua » tru cua, tranh cua, tu cua
te sach » toc sach
sach ty » sach y, sach tu, sach thu
thuc va » thuc vat, thuc dan, thuc day
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
loc va » hoc 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: te sach ty ((nang ma) or (mang may)) hoi. hieu va cham ((thuc va) or (loc va)) hanh trau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang ma) OR (mang may)) hoi. hieu va cham ((thuc va) OR (loc va)) hanh trau cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang ma) or (mang may)) hoi. hieu va cham ((thuc va) or (loc va)) hanh trau cua tre*.