Perhaps you should try some spelling variations:
dong dat » dong vat, dung dat, dong ha
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu su » hieu sau, tieu su, hieu so
su cham » su pham, tu cham, vu cham
dat cua » dai cua, day cua, mat 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, duc 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 su cham ((xuc va) or (((tuc va) or (tuc xa)))) dong dat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu su cham ((xuc va) OR (((tuc va) OR (tuc xa)))) dong dat cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu su cham ((xuc va) or (((tuc va) or (tuc xa)))) dong dat cua tre*.