Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
hieu van » hieu va, thien van, lieu va
dang hoa » dang hoai, dang khoa, dong hoa
tan hanh » tan thanh, tang hanh, toan hanh
cao duc » dao duc, cao suc, giao duc
cuu tre » cua tre, cau tren, cau treo
hoa hoi » khoa hoi, hoa hoc, hoa doi
van cao » van dao, van bao, van hao
sac ky » cac ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sai ky) or (sac ky)) dang hoa hoi. hieu van cao duc tan hanh thai ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sai ky) OR (sac ky)) dang hoa hoi. hieu van cao duc tan hanh thai ((cuu tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su ((sai ky) or (sac ky)) dang hoa hoi. hieu van cao duc tan hanh thai ((cuu tre) or (cua te))*.