Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
cong thuoc » cong thuc, dong thuoc, cong thuong
long thuoc » luong thuoc, dong thuoc, khong thuoc
hoc nganh » hoc nhanh
manh hon » manh ho, minh hon, manh huong
cong hoc » dong hoc, cong hoa, cong coc
nhan van » nhan dan, nhan va, phan van
tu manh » tu minh, tu hanh, vu manh
hon tap » hoc tap, han tap, con tap
mai hoi » mai khoi, dai hoi, lai hoi
va nhan » van nhan, ca nhan, va 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 manh hon tap, nghien thu cong hoc nganh ((cong thuoc) or (long thuoc)) mai hoi va nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu manh hon tap, nghien thu cong hoc nganh ((cong thuoc) OR (long thuoc)) mai hoi va nhan van.
• Adding a wildcard symbol may retrieve word variants: tu manh hon tap, nghien thu cong hoc nganh ((cong thuoc) or (long thuoc)) mai hoi va nhan van*.