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