Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
thuc van » thuc vat, thuc dan, thuc va
te sach » toc sach
va cham » va chat, va tham
doi cua » dai cua, hoi cua
duc van » duc va, duc tan, duc manh
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua te » cua tu

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 xa) or (nang ma)) hoi. hieu va cham ((thuc van) or (duc van)) thanh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (nang ma)) hoi. hieu va cham ((thuc van) OR (duc van)) thanh doi cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) or (nang ma)) hoi. hieu va cham ((thuc van) or (duc van)) thanh doi cua te*.