Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
thu sach » tu sach, thuat sach, thuoc sach
va doanh » van doanh, vay doanh, va danh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham lo » cham o, cam lo, cham soc
ly nang » ky nang, ly hang, ly vang
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
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: thu sach ((ly nang) or (ty xang)) ((xa hoi) or (ma hoa)). hieu ve cham lo va doanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ly nang) OR (ty xang)) ((xa hoi) OR (ma hoa)). hieu ve cham lo va doanh van cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ly nang) or (ty xang)) ((xa hoi) or (ma hoa)). hieu ve cham lo va doanh van cua tre*.