Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
nhanh hung » thanh hung, nhanh hong, nhanh chuong
hoc nhanh » hoc nganh, hoc phan
sach hoi » sach doi, sach moi, cach thoi
hung hoc » chung hoc, khung hoc, nhung hoc
tu sach » thu sach, su sach, te sach
hoi tai » hoc tai, hoi trac
huu mot » cuu mot, huy mot, hieu mot
mot hoc » mon hoc, mo hoc, mot goc
va nhan » van nhan, va phan, va nha
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hoi tai, nghien huu mot hoc nhanh hung hoc xa hoi ((va nhan) OR (ca nhan)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoi tai, nghien huu mot hoc nhanh hung hoc xa hoi ((va nhan) OR (ca nhan)) van".
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tai, nghien huu mot hoc nhanh hung hoc xa hoi ((va nhan) OR (ca nhan)) van*.