Perhaps you should try some spelling variations:
nganh hoa » khanh hoa, danh hoa, ninh hoa
thanh hoa » thanh pho
luan phan » luan van, luan hoan
sach doi » sach hoi, sach moi, sach dao
hoc luan » hoc quan, nuoc luan, hoc luong
phan dau » phan tu, hang dau
tu sach » thu sach, su sach, te sach
doi tap » doi tac, doi dap, doi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc xa » hoc ma
xa hoc » xa hoi, va hoc, xa hoa

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 doi tap, nghien cuu mon hoc ((nganh hoa) or (thanh hoa)) hoc xa hoc luan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach doi tap, nghien cuu mon hoc ((nganh hoa) OR (thanh hoa)) hoc xa hoc luan phan dau.
• Adding a wildcard symbol may retrieve word variants: tu sach doi tap, nghien cuu mon hoc ((nganh hoa) or (thanh hoa)) hoc xa hoc luan phan dau*.