Perhaps you should try some spelling variations:
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
te sach » toc sach
dam tuc » dam thuc, dao tuc, nam thuc
nang ma » tang ma, sang ma, nang cao
dam tu » nam tu, cam tu, tam tu
ma hoi » mai hoi, xa hoi, ma hoa
bat va » ban va, dat va, sat va
vat va » dat va

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 hoi. lieu va ((dam tuc) or (dam tu)) va danh ((bat va) OR (vat va)) thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. lieu va ((dam tuc) OR (dam tu)) va danh ((bat va) OR (vat va)) thieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. lieu va ((dam tuc) or (dam tu)) va danh ((bat va) OR (vat va)) thieu".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. lieu va ((dam tuc) or (dam tu)) va danh ((bat va) OR (vat va)) thieu*.