Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh van » doan van, doanh va, doanh ban
chu bang » thu bang, chuc nang, chu quang
va doanh » van doanh, vay doanh, va danh
cham doc » cham soc, chat doc, chau doc
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
thu ban » thu hang
va cham » va chat, va tham
doc va » duoc va, hoc va, duc va

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