Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
su triet » su viet, ve triet
khach ty » sach ty
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ty tang » tay tang, ty xang, ty hang
su tien » su kien, su hien, tu tieng
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach ty tang ((ma hoi) or (mai hoi)). hieu ve cam luc va hanh vi ((su triet) OR (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ty tang ((ma hoi) OR (mai hoi)). hieu ve cam luc va hanh vi ((su triet) OR (su tien))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ty tang ((ma hoi) or (mai hoi)). hieu ve cam luc va hanh vi ((su triet) OR (su tien))*".