Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cam dua » ca dua, cay dua, cach dua
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ma hoa. hieu va ((cam dua) or (chay dua)) ban thanh vai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoa. hieu va ((cam dua) OR (chay dua)) ban thanh vai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoa. hieu va ((cam dua) or (chay dua)) ban thanh vai ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoa. hieu va ((cam dua) or (chay dua)) ban thanh vai ((cua te) OR (cua tu))*.