Perhaps you should try some spelling variations:
thanh gian » thanh giang, thach giang, thanh san
van thanh » ban thanh, van tuan
gian cua » gian xu, ban cua
sach ky » sach y, sach ty, sach kem
cac dac » cac dan, cac dai, cac bac
cac duc » cac du, cao duc, cac nuoc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sac ky)) nang x hoi. hieu ve ((cac duc) or (cac dac)) van thanh gian cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang x hoi. hieu ve ((cac duc) OR (cac dac)) van thanh gian cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang x hoi. hieu ve ((cac duc) or (cac dac)) van thanh gian cua tre*.