Perhaps you should try some spelling variations:
khong huong » khong xuong, thong huong, thong thuong
nganh khong » nganh cong, nhanh chong, nganh nong
cach thoi » cac thoi, cach thuc, cach noi
hoc nganh » hoc nhanh
thoi tap » toi tap, hoc tap, thoi dai
cuu toan » cuu hoan, cua toan, huu toan
toan hoc » toan khoa, van hoc, hoa hoc
huong xa » huong va, duong xa, hmong xa
nhan tai » van tai, toan tai
hang tai » hang va, dung tai
so cach » so sach, co cach, loi cach

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

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