Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang dau » hang va, hang tai
danh dau » lanh dao, danh tu, xang dau
chat luc » chat xuc, chat lua, nhan luc
te sach » toc sach
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ve chat » va chat, van chat
y tang » ky tang, 6 tang, 7 tang
luc va » duc va, tuc va, loc va
ma hoi » xa hoi, ma hoa, me hoi

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

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