Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
hanh hai » thanh hai, nhanh hai, hang hai
cau luc » cau truc, cau phuc
nang xa » nang x, lang xa, mang xa
hai cua » thai cua, dai cua, hoi cua
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
cac luc » coc luc, cac nuoc, cac cuoc
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 (cau luc)) va hanh hai 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 (cau luc)) va hanh hai 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 (cau luc)) va hanh hai cua te*".