Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
di cua » dai cua, doi cua, de cua
su sai » su tai, su hai, su dai
sai ky » sac ky
ma hoi » xa hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam

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 hoi) or (mai hoi)). hieu ve cam duc ((van hanh) OR (van thanh)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky nang ((ma hoi) OR (mai hoi)). hieu ve cam duc ((van hanh) OR (van thanh)) di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky nang ((ma hoi) or (mai hoi)). hieu ve cam duc ((van hanh) OR (van thanh)) di cua triet".
• Adding a wildcard symbol may retrieve word variants: su sai ky nang ((ma hoi) or (mai hoi)). hieu ve cam duc ((van hanh) OR (van thanh)) di cua triet*.