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
sai ky » sac ky
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
su sai » su tai, su hai, su dai

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

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