Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
van giao » nang giao, toan giao, dan gian
va thanh » gia thanh, ban thanh, va tinh
cau treo » cau theo, cau tren, cau triet
sach ky » sach y, sach ty, sach kem
cuu tre » cua tre, cau tren
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: thu ((sach ky) OR (sac ky)) nang x hoi. hieu van giao duc va thanh hai ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sac ky)) nang x hoi. hieu van giao duc va thanh hai ((cuu tre) OR (cau treo))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sac ky)) nang x hoi. hieu van giao duc va thanh hai ((cuu tre) or (cau treo))*".