Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
dang xay » dang van
cua loc » chua loc, cua hoc, cua lop
va danh » va dan, va hanh, dia danh
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
vu san » va san, vu ban
san ky » sang 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 san ky ((dang xay) OR (van xay)) hoi. hieu viec cua loc ((va danh) or (va dinh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ky ((dang xay) OR (van xay)) hoi. hieu viec cua loc ((va danh) OR (va dinh)) vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu san ky ((dang xay) OR (van xay)) hoi. hieu viec cua loc ((va danh) or (va dinh)) vai cua te*".