Perhaps you should try some spelling variations:
hoc khanh » hoc nhanh, hoc thanh, hoc hanh
khanh hoa » thanh hoa, hang hoa
thu sinh » thu minh, thu kinh, thuoc sinh
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
ban soan » bien soan, ban doanh, nang soan
hoc xua » hoc cua, hoc xa, hoc lua
xua hai » qua hai, cua hai, xa hai
hai van » thai van, ha van, hai tan
ban sac » ban sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sinh hoc tap, nghien cuu cong hoc khanh hoa hoc xua hai van ((ban sac) or (ban soan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sinh hoc tap, nghien cuu cong hoc khanh hoa hoc xua hai van ((ban sac) OR (ban soan)).
• Adding a wildcard symbol may retrieve word variants: thu sinh hoc tap, nghien cuu cong hoc khanh hoa hoc xua hai van ((ban sac) or (ban soan))*.