Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang mai » nang ma, nang tai, lang mai
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
mai hoi » mai khoi, dai hoi, lai hoi
sac ky » cac ky
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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

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