Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
thanh phan » thanh pho, thanh san, thanh hai
thanh toan » thanh hoa, thanh san, tinh toan
hoc nganh » hoc nhanh
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoi » sach doi, sach moi, cach thoi
cong hoc » dong hoc, cong hoa, cong coc
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoc tap, hoi tai
hoi van » hoi va, hoi dan, hai van
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 tap, nghien thu cong hoc nganh khong hoc xa hoi van ((thanh phan) or (thanh toan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi tap, nghien thu cong hoc nganh khong hoc xa hoi van ((thanh phan) OR (thanh toan)).
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien thu cong hoc nganh khong hoc xa hoi van ((thanh phan) or (thanh toan))*.