Perhaps you should try some spelling variations:
cau tran » cau tra, cau tren, chu trang
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
tran ban » tranh ban, tran van, toan ban
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cua triet, dua tren
van cau » van dau, van hau, van chat
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo
sai ky » sac ky

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 (sai ky)) nang xa hoi. hieu van cau tran ban hanh dai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sai ky)) nang xa hoi. hieu van cau tran ban hanh dai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sai ky)) nang xa hoi. hieu van cau tran ban hanh dai ((cua tre) or (cuu tre))*.