Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
te sach » toc sach
dat cua » dai cua, day cua, mat cua
dau dat » dan dat, dau da, dau mat
hieu va » lieu va
ky tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang
ma hoi » mai hoi, xa hoi, ma hoa
va dau » va dao
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 sang) or (ky tang)) ma hoi. ((hieu va) or (hieu qua)) cham duc va dau dat cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky sang) OR (ky tang)) ma hoi. ((hieu va) OR (hieu qua)) cham duc va dau dat cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ((ky sang) or (ky tang)) ma hoi. ((hieu va) or (hieu qua)) cham duc va dau dat cua te*.