Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
khoa hoc » hoa hoc
nhan tai » van tai, toan tai
hang tai » hang va, dung tai
hoc cac » hoc cao
cac doi » cac dai, cac toi, cau doi
doi tap » doi tac, doi dap, doi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc cac doi tap, nghien cuu mon hoc nganh khoa hoc ma hoi va ((nhan tai) or (hang tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc cac doi tap, nghien cuu mon hoc nganh khoa hoc ma hoi va ((nhan tai) OR (hang tai)).
• Adding a wildcard symbol may retrieve word variants: hoc cac doi tap, nghien cuu mon hoc nganh khoa hoc ma hoi va ((nhan tai) or (hang tai))*.