Perhaps you should try some spelling variations:
vien cong » viec cong, tien cong, dien cong
hieu vien » hieu hien, hieu viec, thieu nien
cong cua » cong cu, dong cua, huong cua
va tinh » may tinh
tu sach » thu sach, su sach, te sach
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky danh
cua va » cua vat, chua va, cua van
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ky dang) or (ky nang)) xay hoi. hieu vien cong cua va tinh ((va cau) or (va che)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky nang)) xay hoi. hieu vien cong cua va tinh ((va cau) OR (va che)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky dang) or (ky nang)) xay hoi. hieu vien cong cua va tinh ((va cau) or (va che)) tre*.