Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh thu » doanh tai
cham luc » cham soc, nhan luc, cham cuu
danh tu » anh tu
te sach » toc sach
hieu ve » hieu van
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
y tang » ky tang, 6 tang, 7 tang
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang ma hoi. ((hieu ve) OR (hieu va)) cham luc va ((danh tu) OR (doanh thu)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y tang ma hoi. ((hieu ve) OR (hieu va)) cham luc va ((danh tu) or (doanh thu)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: te sach y tang ma hoi. ((hieu ve) OR (hieu va)) cham luc va ((danh tu) or (doanh thu)) cua triet*.