Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, hieu hien
sieu viet » su viet, dien viet, bien viet
hanh vai » hanh vi, hanh va, hanh tai
nang dai » nang dau, nang tai, lang dai
dai khoa » da khoa, tai khoa, dac khoa
bach xuc » bach tuoc, bach xuan, bach hue
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
ca viet » va viet, co viet, hoa viet
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
xuc va » duc va, tuc va, luc va
vai ca » vai cac, vai cua, bai ca

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 ty nang dai khoa. ((hieu viec) OR (sieu viet)) bach xuc va hanh vai ca viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang dai khoa. ((hieu viec) OR (sieu viet)) bach xuc va hanh vai ca viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang dai khoa. ((hieu viec) OR (sieu viet)) bach xuc va hanh vai ca viet*.