Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doc sach » hoc sach, toc sach, nuoc sach
sach dao » lanh dao
dao hanh » dao thanh, dang hanh, ban hanh
hanh mau » thanh mau, anh mau, hanh ma
mau hoi » cau hoi, mai hoi, mau ho
cac tuc » cac tu, cac tac, cac nuoc
cac toc » cac toi, cac nuoc, cac thoi
xa hanh » xa thanh, xa khanh, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach dao hanh mau hoi. hieu qua ((cac tuc) or (cac toc)) xa hanh vi ((cua triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach dao hanh mau hoi. hieu qua ((cac tuc) OR (cac toc)) xa hanh vi ((cua triet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: doc sach dao hanh mau hoi. hieu qua ((cac tuc) or (cac toc)) xa hanh vi ((cua triet) or (cua vat))*.