Perhaps you should try some spelling variations:
nang nam » dang nam, hang nam, nang lam
thi nang » thi cong, ki nang, thi hanh
nam thuc » nam thuoc, am thuc, nam thu
vat hanh » vat thanh, van hanh, va hanh
hanh don » hanh dong, nhanh dong, hanh doanh
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, tu cach
te sach » toc sach
don su » dong su, down su, dan su
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky nang x hoi. thi nang nam thuc vat hanh don su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang x hoi. thi nang nam thuc vat hanh don su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang x hoi. thi nang nam thuc vat hanh don su triet*.