Perhaps you should try some spelling variations:
thien van » thi van
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
sach ty » sach y, sach tu, sach thu
van cau » van dau, van hau, van chat
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
su sach » so sach, vu sach
ma hoi » xa hoi, ma hoa, me hoi
luc va » duc va, tuc va, loc va
vi 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 sach ty nang ((ma hoi) or (mai hoi)). thien van cau luc va hanh ((vi cua) OR (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ((ma hoi) OR (mai hoi)). thien van cau luc va hanh ((vi cua) OR (vai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ((ma hoi) or (mai hoi)). thien van cau luc va hanh ((vi cua) OR (vai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ((ma hoi) or (mai hoi)). thien van cau luc va hanh ((vi cua) OR (vai cua)) triet*.