Perhaps you should try some spelling variations:
cham truong » pham truong, cam truong, cac truong
truong va » truong dai, truong cao, truong dao
cua triet » cua viet, su triet, va triet
qua cham » qua hai, qua cac, va cham
so sach » so sanh, bo sach, co sach
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
va hanh » van hanh, va thanh, va danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y ((nang ma) OR (tang ma)) hoi. hieu qua cham truong va hanh vi ((cua triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang ma) OR (tang ma)) hoi. hieu qua cham truong va hanh vi ((cua triet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((nang ma) OR (tang ma)) hoi. hieu qua cham truong va hanh vi ((cua triet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang ma) OR (tang ma)) hoi. hieu qua cham truong va hanh vi ((cua triet) or (cua vat))*.