Perhaps you should try some spelling variations:
khoa nganh » khoi nganh, hoc nganh
nganh hoa » thanh hoa, khanh hoa, danh hoa
cach hoc » cach thuc, cach thoi, dich hoc
cuu toan » cuu hoan, cua toan, huu toan
cong tai » cong thai, cong tac, dong tai
bac hoc » bai hoc, bac ho
hoi cua » hoi chuc
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 ((bac hoc) or (cach hoc)) tap, nghien cuu toan khoa nganh hoa hoc xa hoi cua cong tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((bac hoc) OR (cach hoc)) tap, nghien cuu toan khoa nganh hoa hoc xa hoi cua cong tai.
• Adding a wildcard symbol may retrieve word variants: tu ((bac hoc) or (cach hoc)) tap, nghien cuu toan khoa nganh hoa hoc xa hoi cua cong tai*.