Perhaps you should try some spelling variations:
dong dat » dong vat, dung dat, dong ha
te sach » toc sach
dat cua » dai cua, day cua, mat 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
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ma hoi » xa hoi, ma hoa, me hoi

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) OR (mai hoi)). hieu vu cham ((xuc va) or (tuc va)) dong dat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((ma hoi) OR (mai hoi)). hieu vu cham ((xuc va) OR (tuc va)) dong dat cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((ma hoi) OR (mai hoi)). hieu vu cham ((xuc va) or (tuc va)) dong dat cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((ma hoi) OR (mai hoi)). hieu vu cham ((xuc va) or (tuc va)) dong dat cua tre*.