Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
cham duc » pham duc, cham soc, pham duy
hieu van » hieu va, thien van, lieu va
cua tre » cuu tre, cua triet, dua tren
duc ban » duc tan, duc van, dua ban
tu sach » thu sach, su sach, te sach
hieu ve » hieu va
tang ma » mang may, tang van
y tang » ky tang, 6 tang, 7 tang
ma hoi » mai hoi, xa hoi, ma hoa
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 y tang ma hoi. ((hieu ve) OR (hieu van)) cham duc ban thanh vai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y tang ma hoi. ((hieu ve) OR (hieu van)) cham duc ban thanh vai ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y tang ma hoi. ((hieu ve) OR (hieu van)) cham duc ban thanh vai ((cua tre) or (cua te))*".