Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
chuc nganh » chuc nang, hoc nganh, cac nganh
nganh cong » nhanh chong, thanh cong
cong thuoc » cong thuc, dong thuoc, long thuoc
dung chuc » dung thuoc, dung chung, dung cho
cach hoc » cach thuc, cach thoi, dich hoc
huu dung » huu tung, huu quang, thuy dung
thuoc va » thuc va, thuoc ma, thuong va
tu cach » tu cac
va pham » van pham, va phat, va phan
va phap » va phat, ban phap
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: tu cach hoc tap, nghien huu dung chuc nganh cong thuoc va hoi ((va pham) or (va phap)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoc tap, nghien huu dung chuc nganh cong thuoc va hoi ((va pham) OR (va phap)) van.
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien huu dung chuc nganh cong thuoc va hoi ((va pham) or (va phap)) van*.