Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
sach ly » sach y, sach lo, sach ty
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao

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 ly ((hang va) or (nang cao)) hoi. hieu va cam luc va hanh vi ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((hang va) OR (nang cao)) hoi. hieu va cam luc va hanh vi ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ly ((hang va) or (nang cao)) hoi. hieu va cam luc va hanh vi ((cua triet) or (su triet))*.