Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dung hoi » duong hoi, dung hoai, dung thoi
vat dung » van dung, va dung, viet dung
cac toc » cac toi, cac nuoc, cac thoi
hoi cua » hoi chuc
sach ty » sach tu, sach thu, xach tay
cac tuc » cac tu, cac tac, cac nuoc
x hoi » xa hoi, o hoi, x ho

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 ty) or (sach y)) nang x hoi. hieu qua ((cac tuc) or (cac toc)) vat dung hoi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) nang x hoi. hieu qua ((cac tuc) OR (cac toc)) vat dung hoi cua triet.
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach y)) nang x hoi. hieu qua ((cac tuc) or (cac toc)) vat dung hoi cua triet*.