Perhaps you should try some spelling variations:
thien van » thi van
nam thuc » nam thuoc, am thuc, nam thu
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
thuc va » thuc vat, thuc dan, thuc day
va dan » ca dan, va dao, va dau
di cua » doi cua, de cua, do cua
x hoi » xa hoi, o hoi, 5 hoi

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 ((x hoi) or (x ho)). thien van nam thuc va dan ((di cua) or (dai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((x hoi) OR (x ho)). thien van nam thuc va dan ((di cua) OR (dai cua)) viet.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((x hoi) or (x ho)). thien van nam thuc va dan ((di cua) or (dai cua)) viet*.