Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh cong » nhanh chong, thanh cong
thanh toan » thanh hoa, thanh san, tinh toan
hoc nganh » hoc nhanh
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
cong hoc » dong hoc, cong hoa, cong coc
hoi tap » hoi dap, hoc tap, hai tap
hoi tai » hoc tai, hoi trac
doi ban » di ban, do ban, dong ban
ma doi » mai doi, va doi, ma di

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((hoi tap) or (hoi tai)), nghien thu cong hoc nganh cong hoc ma doi ban thanh toan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((hoi tap) OR (hoi tai)), nghien thu cong hoc nganh cong hoc ma doi ban thanh toan.
• Adding a wildcard symbol may retrieve word variants: toc sach ((hoi tap) or (hoi tai)), nghien thu cong hoc nganh cong hoc ma doi ban thanh toan*.