Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
hoc thanh » hoc nhanh, hoan thanh, hoc phan
thanh hoa » thanh pho
gian lang » gian dan
thoi tap » toi tap, hoc tap, thoi dai
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
nhan tai » hang tai, van tai, toan tai
tu cach » tu cac
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach thoi tap, nghien cuu cong hoc thanh hoa hoc xa hoi va ((gian lang) or (nhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien cuu cong hoc thanh hoa hoc xa hoi va ((gian lang) OR (nhan tai)).
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien cuu cong hoc thanh hoa hoc xa hoi va ((gian lang) or (nhan tai))*.