Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
cao xuc » cam xuc, cao duc, cao suc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
va cao » va cac, va co, va dao
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
de cua » le cua, te cua, dieu 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 y nang ((ma hoi) OR (ma hoa)). hieu va cao xuc va hanh ((vi cua) or (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((ma hoi) OR (ma hoa)). hieu va cao xuc va hanh ((vi cua) OR (de cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((ma hoi) OR (ma hoa)). hieu va cao xuc va hanh ((vi cua) or (de cua)) tre*".