Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghiem thuc » nghiem thuoc, nghiep thuc, nhiem thuc
nghien thu » nghiep thuc, nghien cuu, nghe thu
hoc nganh » hoc nhanh
khong hoc » khung hoc, thong hoc, khong thuoc
cach hoc » cach thuc, cach thoi, dich hoc
cong hoc » dong hoc, cong hoa, cong coc
van gian » van giang, dan gian, van giao
gian dan » gian lang
tu cach » tu cac
hoa van » hoa dan, hoang van, hoa phan

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 hoc tap, ((nghien thu) or (nghiem thuc)) cong hoc nganh khong hoc ma hoa van gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoc tap, ((nghien thu) OR (nghiem thuc)) cong hoc nganh khong hoc ma hoa van gian dan.
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, ((nghien thu) or (nghiem thuc)) cong hoc nganh khong hoc ma hoa van gian dan*.