Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
viec bach » vien bach, viec ban, viec bao
nang dai » nang dau, nang tai, lang dai
dai khoa » da khoa, tai khoa, dac khoa
bach xuc » bach tuoc, bach xuan, bach hue
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua dieu
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc 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 tu nang dai khoa. nhieu viec bach xuc va hanh vai ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang dai khoa. nhieu viec bach xuc va hanh vai ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang dai khoa. nhieu viec bach xuc va hanh vai ((cua viet) or (cua vat))*.