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