Perhaps you should try some spelling variations:
viec cac » viec cua, viec lam, viec va
vien cac » vien bach, vien dai, gian cac
hanh hai » thanh hai, nhanh hai, hang hai
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
vien da » vien dai, hien dai
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
vu san » va san, vu ban
san ky » sang ky, van ky, dan ky
luc va » duc va, tuc va, loc va
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 san ky tang xa hoi. hieu ((viec cac) or (((vien cac) OR (vien da)))) luc va hanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ky tang xa hoi. hieu ((viec cac) OR (((vien cac) OR (vien da)))) luc va hanh hai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu san ky tang xa hoi. hieu ((viec cac) or (((vien cac) OR (vien da)))) luc va hanh hai cua te*".