Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
va doanh » van doanh, vay doanh, va danh
cham cuu » cap cuu, chat cua
cham luc » cham soc, nhan luc, chat lua
tu sach » thu sach, su sach, te sach
van cua » vang cua, ban cua, dan cua
hieu ve » hieu va, hieu van
va nang » van nang, da nang, cam nang
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet

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 ((ly nang) or (va nang)) xa hoi. hieu ve ((cham luc) OR (cham cuu)) va doanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly nang) OR (va nang)) xa hoi. hieu ve ((cham luc) OR (cham cuu)) va doanh van cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ly nang) or (va nang)) xa hoi. hieu ve ((cham luc) OR (cham cuu)) va doanh van cua tre*".