Perhaps you should try some spelling variations:
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
mo thuc » mot thuc, do thuc, co thuc
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, bai cua
lai cua » dai cua, hai cua, lai chau
va mo » va mot, va moi, vi mo

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 tu nang xa hoi. hieu va mo thuc va hanh ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang xa hoi. hieu va mo thuc va hanh ((vai cua) OR (lai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach tu nang xa hoi. hieu va mo thuc va hanh ((vai cua) or (lai cua)) tre*.