Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
cau treo » cau theo, cau tren, cau trieu
ban banh » ban hanh, ban anh, ban danh
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
sach ky » sach y, sach ty, sach kem
cuc ban » cua ban, cac ban, cuu ban
banh di » danh di, xanh di, banh chi
cam cuc » cam xuc, cham cuu, pham cuc
sac ky » cac ky, sai ky

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 xa hoi. hieu van cam cuc ban banh di ((cau treo) OR (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sac ky)) nang xa hoi. hieu van cam cuc ban banh di ((cau treo) OR (cau triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sac ky)) nang xa hoi. hieu van cam cuc ban banh di ((cau treo) OR (cau triet))*".