Perhaps you should try some spelling variations:
hoach hoi » hoc hoi, hoach ha, sach hoi
tu hoach » thu hoach, tu hach, quy hoach
hoc toan » hoc tan, hop toan, hoa toan
toan hoa » toan khoa, toan hoat, toan hoc
nhan dan » phan dau, gian dan, nhan tai
phan van » pham van, thanh van, luan van
hoi tap » hoi dap, hoc tap, hoi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi cua » hoi chuc
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 hoach hoi tap, nghien cuu mon hoc toan hoa hoc xa hoi cua ((nhan dan) or (phan van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu hoach hoi tap, nghien cuu mon hoc toan hoa hoc xa hoi cua ((nhan dan) OR (phan van)).
• Adding a wildcard symbol may retrieve word variants: tu hoach hoi tap, nghien cuu mon hoc toan hoa hoc xa hoi cua ((nhan dan) or (phan van))*.