Perhaps you should try some spelling variations:
nganh hoa » thanh hoa, khanh hoa, danh hoa
hoi thanh » hoc thanh, hai thanh, hoa thanh
thanh tan » thanh toan, thanh tuan, thanh san
sach hoi » sach doi, sach moi, cach thoi
so sach » so sanh, bo sach, co sach
mon hoc » toan hoc, dong hoc
tan van » tran van, tang van, luan van
mo hoc » co hoc
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: so sach hoi dap, nghien cuu ((mo hoc) or (mon hoc)) nganh hoa hoc xa hoi thanh tan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoi dap, nghien cuu ((mo hoc) OR (mon hoc)) nganh hoa hoc xa hoi thanh tan van.
• Adding a wildcard symbol may retrieve word variants: so sach hoi dap, nghien cuu ((mo hoc) or (mon hoc)) nganh hoa hoc xa hoi thanh tan van*.