Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
xa thanh » va thanh, ha thanh, ta thanh
nam thuc » nam thuoc, am thuc, nam thu
sach ky » sac ky, sach y, sach ty
vai cua » dai cua, hai cua, lai cua
thuc xa » thuc xay, tuc xa, thuc va
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
va nam » van nam, ha nam, va nay
ma hoi » ma hoa, me hoi, va hoi
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 ky sang ((((ma hoi) OR (mai hoi))) or (xa hoi)). hieu va nam thuc xa thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ((((ma hoi) OR (mai hoi))) OR (xa hoi)). hieu va nam thuc xa thanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang ((((ma hoi) OR (mai hoi))) or (xa hoi)). hieu va nam thuc xa thanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ((((ma hoi) OR (mai hoi))) or (xa hoi)). hieu va nam thuc xa thanh vai cua te*.