Perhaps you should try some spelling variations:
sieu viet » su viet, dien viet, bien viet
hieu viec » nhieu viec, hieu ve, hieu hien
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
cua viet » ca viet, hoa viet, cua vat
cac xuc » cac nuoc, chat xuc, cac cuoc
nang ma » tang ma, sang ma, nang cao
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. ((hieu viec) OR (sieu viet)) ((cac xuc) or (cam xuc)) ban hanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. ((hieu viec) OR (sieu viet)) ((cac xuc) OR (cam xuc)) ban hanh dai cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoi. ((hieu viec) OR (sieu viet)) ((cac xuc) or (cam xuc)) ban hanh dai cua viet*".