Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
hanh vai » hanh vi, hanh va, hanh tai
cac luc » cau luc, cac nuoc, cac cuoc
nang xa » nang x, lang xa, mang xa
vai cua » dai cua, hai cua, lai cua
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
vu ban » tu ban, va ban
ban ky » van ky, dan ky
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu ban ky ((nang xa) OR (nang ma)) hoi. hieu viec ((cac luc) or (coc luc)) va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ban ky ((nang xa) OR (nang ma)) hoi. hieu viec ((cac luc) OR (coc luc)) va hanh vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ban ky ((nang xa) OR (nang ma)) hoi. hieu viec ((cac luc) or (coc luc)) va hanh vai cua te*".