Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
dau cua » day cua, cau cua, dan cua
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc 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 cao hoi. hieu vu cham ((xuc va) OR (luc va)) dan ((dau cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cao hoi. hieu vu cham ((xuc va) OR (luc va)) dan ((dau cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang cao hoi. hieu vu cham ((xuc va) OR (luc va)) dan ((dau cua) or (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cao hoi. hieu vu cham ((xuc va) OR (luc va)) dan ((dau cua) or (dai cua)) te*.