Perhaps you should try some spelling variations:
trinh phan » trinh han, trinh quan, thanh phan
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
cuu hoan » luu hoang, cuu van, cuu khoa
hoan hoc » toan hoc, hoang hoa, khoan hoi
tu sach » thu sach, su sach, te sach
hoi lap » hoi dap, hoc lap, hoa lap
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) or (thu hoach)) hoc tap, nghien cuu hoan hoc nganh hoa hoc xa hoi lap trinh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) hoc tap, nghien cuu hoan hoc nganh hoa hoc xa hoi lap trinh phan.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) hoc tap, nghien cuu hoan hoc nganh hoa hoc xa hoi lap trinh phan*.