Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nham thuc » nhan thuc, nam thuc, nham thu
nang mai » nang ma, nang tai, lang mai
van nham » van nam, van nhan, van tham
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
hanh dai » hanh tai, hanh dao, vanh dai
su triet » su viet, su tien, ve triet
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
thi van » thi lan, thi hanh, thi nang
dai su » dai sua, dai so, dan su

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) or (thuat sach)) ky nang mai hoi. thi van nham thuc day hanh dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat sach)) ky nang mai hoi. thi van nham thuc day hanh dai su triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat sach)) ky nang mai hoi. thi van nham thuc day hanh dai su triet*.