Perhaps you should try some spelling variations:
te sach » toc sach
dat cua » dai cua, day cua, mat cua
dan dat » dung dat, dong dat, dinh dat
sach ky » sac ky, sach y, sach ty
hieu su » hieu sau, tieu su, hieu so
su cham » su pham, tu cham, vu cham
mai hoi » mai khoi, dai hoi, lai hoi
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ma hoi » xa hoi, ma hoa, me hoi
cua te » cua tu

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