Perhaps you should try some spelling variations:
va doanh » van doanh, vay doanh, va danh
su sach » so sach, vu sach
via cua » gia cua, gian cua, giau cua
va chua » vua chua, ca chua, va chu
hieu ve » hieu va, hieu van
ty nang » ky nang, ty hang, ly nang
ve cac » va cac, vien cac
cac lo » cac lop, cac co, cac bo
lo va » lo van, lao va, ly va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty nang) or (ty xang)) xa hoi. hieu ve cac lo va doanh ((va chua) or (via cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty xang)) xa hoi. hieu ve cac lo va doanh ((va chua) OR (via cua)) tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ty xang)) xa hoi. hieu ve cac lo va doanh ((va chua) or (via cua)) tre*.