Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
dan day » da day, dan dat, dan da
day cua » dai cua
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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 day 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 day 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 day cua tre*.