Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoc nhanh » hoc nganh, hoc phan
manh hoc » anh hoc, manh ho, manh hon
huu toan » huu tuan, cuu toan, huy toan
toan hoc » toan khoa, van hoc, tin hoc
phat dau » phan dau, pham dau, phap dau
tu manh » tu minh, tu hanh, vu manh

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 huu toan hoc nhanh ((khoa hoc) OR (hoa hoc)) xa hoi va phat dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu manh hoc tap, nghien huu toan hoc nhanh ((khoa hoc) OR (hoa hoc)) xa hoi va phat dau".
• Adding a wildcard symbol may retrieve word variants: tu manh hoc tap, nghien huu toan hoc nhanh ((khoa hoc) OR (hoa hoc)) xa hoi va phat dau*.