Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang dau » hang tai
kham luc » khai luoc, kham cuoc, nhan luc
hieu vu » hieu va, hieu ve, hieu su
te sach » toc sach
vu kham » vu khanh
ma hoi » mai hoi, xa hoi, ma hoa
y tang » ky tang, 6 tang, 5 tang
7 tang » 6 tang
luc va » duc va, tuc va, loc va

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) or (7 tang)) ma hoi. hieu vu kham luc va ((hang dau) OR (hang va)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y tang) OR (7 tang)) ma hoi. hieu vu kham luc va ((hang dau) OR (hang va)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y tang) or (7 tang)) ma hoi. hieu vu kham luc va ((hang dau) OR (hang va)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((y tang) or (7 tang)) ma hoi. hieu vu kham luc va ((hang dau) OR (hang va)) cua triet*.