Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
van hanh » van thanh, ban hanh, van anh
va hanh » va thanh, va danh, ban hanh
nang ma » tang ma, sang ma, nang cao
vai cua » dai cua, hai cua, lai cua
lang xa » lang ha, dang xay, lang van
cac luc » cau luc, coc luc, cac nuoc
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 ma) or (lang xa)) hoi. hieu viec cac luc ((va hanh) OR (van hanh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ban ky ((nang ma) OR (lang xa)) hoi. hieu viec cac luc ((va hanh) OR (van hanh)) vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ban ky ((nang ma) or (lang xa)) hoi. hieu viec cac luc ((va hanh) OR (van hanh)) vai cua te*".