Perhaps you should try some spelling variations:
tu sach » thu sach, te sach, tu cach
va hanh » van hanh, va thanh, va danh
cao xuc » cam xuc, cao duc, cao suc
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
su sach » so sach, vu sach
ma hoi » xa hoi, ma hoa, me hoi
va cao » va cac, va co, va dao
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
cua te » cua tu

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) or (su sach)) ky nang ((ma hoi) OR (mai hoi)). hieu va cao xuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ((ma hoi) OR (mai hoi)). hieu va cao xuc va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang ((ma hoi) OR (mai hoi)). hieu va cao xuc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ((ma hoi) OR (mai hoi)). hieu va cao xuc va hanh vi cua te*.