Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
nganh khoa » nganh hoa, nganh khong, doanh khoa
thanh toan » thanh hoa, thanh san, tinh toan
hoc nganh » hoc nhanh
sach hoc » cach hoc, sach hoi, mach hoc
sach moi » sach doi, sach hoi, bach mai
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
hoa gia » hoa giao, hoa giai, hoang gia

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 hoc) or (sach moi)) tap, nghien cua cong hoc nganh khoa hoc ma hoa gia thanh toan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoc) OR (sach moi)) tap, nghien cua cong hoc nganh khoa hoc ma hoa gia thanh toan.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoc) or (sach moi)) tap, nghien cua cong hoc nganh khoa hoc ma hoa gia thanh toan*.