Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
tang ma » mang may, tang van
sang ma » nang ma, sang tao, mang may
san ky » sang ky, van ky, dan ky
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
vu san » va san, vu ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu san ky ((sang ma) or (tang ma)) hoi. hieu ve cam luc va hanh vi ((cua triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ky ((sang ma) OR (tang ma)) hoi. hieu ve cam luc va hanh vi ((cua triet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: vu san ky ((sang ma) or (tang ma)) hoi. hieu ve cam luc va hanh vi ((cua triet) or (cua vat))*.