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