Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
viec bach » vien bach, viec ban, viec bao
nang mai » nang ma, nang tai, lang mai
mai khoa » tai khoa, may khoa, dai 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 mai khoa. nhieu viec bach xuc va hanh vai ((cua viet) OR (cua vat))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nang mai 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 mai khoa. nhieu viec bach xuc va hanh vai ((cua viet) OR (cua vat))*.