Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
sang tao » hang tai
cam luoc » cam xuc, tom luoc, dai luoc
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
cam lo » nam lo, cam ly, cam o

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 _ ((sang tao) or (tang ma)) hoi. hieu van ((cam luoc) OR (cam lo)) van thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach _ ((sang tao) OR (tang ma)) hoi. hieu van ((cam luoc) OR (cam lo)) van thanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach _ ((sang tao) or (tang ma)) hoi. hieu van ((cam luoc) OR (cam lo)) van thanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach _ ((sang tao) or (tang ma)) hoi. hieu van ((cam luoc) OR (cam lo)) van thanh dai cua tre*.