Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
hieu van » thien van, lieu va, hieu ve
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
hoc anh » hoc nganh, hoc nhanh, ngoc anh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
vi va » vi van, vai va, vu va

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 (hoc anh)) ky nang xa hoi. ((hieu van) or (hieu va)) nham thuc day hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (hoc anh)) ky nang xa hoi. ((hieu van) OR (hieu va)) nham thuc day hanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc anh)) ky nang xa hoi. ((hieu van) or (hieu va)) nham thuc day hanh vi va triet*.