Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
mai hoi » mai khoi, dai hoi, lai hoi
sach lo » sach dao, sach doi, sach hoi
lo nang » ho nang, ly nang, loai nang
van lam » van nam
lam tuc » lam thuoc, lam truoc, luat tuc
dan hai » doan hai, dang hai, dan khai
hai cua » thai cua, dai cua, hoi cua
su sach » so sach, vu sach
ma hoi » ma hoa, me hoi, va hoi
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach lo nang ((((ma hoi) OR (mai hoi))) or (xa hoi)). hieu van lam tuc va dan hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach lo nang ((((ma hoi) OR (mai hoi))) OR (xa hoi)). hieu van lam tuc va dan hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach lo nang ((((ma hoi) OR (mai hoi))) or (xa hoi)). hieu van lam tuc va dan hai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach lo nang ((((ma hoi) OR (mai hoi))) or (xa hoi)). hieu van lam tuc va dan hai cua triet*.