Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
cach thoi » cac thoi, cach thuc, cach noi
dap thanh » dao thanh, dat thanh, da thanh
thoi tap » toi tap, hoc tap, thoi dai
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
dan hoan » van hoan, dan hoat, dan toan
su cach » su sach, tu cach, su cac
hoc mai » hoc dai, hoc bai, hoc may

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cach thoi tap, nghien cuu cong hoc dan hoan ((hoc mai) or (hoc ma)) hoi dap thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach thoi tap, nghien cuu cong hoc dan hoan ((hoc mai) OR (hoc ma)) hoi dap thanh phan.
• Adding a wildcard symbol may retrieve word variants: su cach thoi tap, nghien cuu cong hoc dan hoan ((hoc mai) or (hoc ma)) hoi dap thanh phan*.