Perhaps you should try some spelling variations:
nganh khong » nhanh chong, nganh nong, nganh khoa
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh cong » nhanh chong, thanh cong
thuoc mai » thuoc ma, thuoc tai, thuoc moi
manh hoc » anh hoc, manh ho, manh hon
cong hoa » dong hoa, dong hoc, hang hoa
van nhan » van phan, van thanh, danh nhan
nhan van » nhan dan, nhan va, phan van
tu manh » tu minh, tu hanh, vu manh
mai hoi » mai khoi, dai hoi, lai hoi
hoi van » hoi va, hoi dan, hai van

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

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