Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
hai dat » cai dat, hoi dat, hai dan
ma hoi » xa hoi, ma hoa, va hoi
me hoi » le hoi
va hai » van hai, va chai, va khai
vi cua » vai 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: thu sach ky nang ((((ma hoi) OR (me hoi))) or (mai hoi)). lieu va hai dat va thanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((((ma hoi) OR (me hoi))) OR (mai hoi)). lieu va hai dat va thanh vi cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((((ma hoi) OR (me hoi))) or (mai hoi)). lieu va hai dat va thanh vi cua vat*".