Perhaps you should try some spelling variations:
sinh cua » manh cua, dinh cuu, sinh va
te sach » toc sach
sach ty » sach y, sach tu, sach thu
xang ma » tang ma, nang ma, sang ma
qua cac » cua cac
cac toc » cac toi, cac nuoc, cac thoi
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
co dao » cao dao, co dan, co dai

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 ty xang ma hoi. hieu qua cac toc ((((co dao) OR (cho dao))) or (ca dao)) sinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty xang ma hoi. hieu qua cac toc ((((co dao) OR (cho dao))) OR (ca dao)) sinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty xang ma hoi. hieu qua cac toc ((((co dao) OR (cho dao))) or (ca dao)) sinh cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty xang ma hoi. hieu qua cac toc ((((co dao) OR (cho dao))) or (ca dao)) sinh cua tre*.