Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thanh va » thanh van, hanh va, thanh ha
thanh vi » hanh vi, thanh ve, nhanh vi
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
hai dan » hai dang, hoi dan, hai tan
va hai » van hai, va chai, va khai
dan va » doan va, dan ca, ban va
ma hoi » xa hoi, ma hoa, me hoi

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 (mai hoi)). lieu va hai dan va ((thanh vi) OR (thanh va)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((ma hoi) OR (mai hoi)). lieu va hai dan va ((thanh vi) OR (thanh va)) cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((ma hoi) or (mai hoi)). lieu va hai dan va ((thanh vi) OR (thanh va)) cua vat*".