Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va hanh » van hanh, va thanh, va danh
va cham » va chat, va tham
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
dai ky » dan ky, dai ly, sai ky
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
su dai » sau dai, si dai, su tai

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

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