Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong thuoc » khang thuoc, hong phuoc, dong thuoc
cach thuc » anh thuc, cac thu
hoc nganh » hoc nhanh
cach hoc » cach thoi, dich hoc, cac hop
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
thuoc va » thuc va, thuoc ma, thuong va
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao
va hoi » xa hoi, va hoc, va hoa

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

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