Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
dap thanh » dao thanh, dat thanh, da thanh
sach hoi » sach doi, sach moi, cach thoi
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 sach » so sach, vu sach
hoi tap » hoc tap, hoi tai, hai tap
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 sach hoi tap, nghien cuu cong hoc dan hoan ((hoc mai) OR (hoc ma)) hoi dap thanh phan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach hoi 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 sach hoi tap, nghien cuu cong hoc dan hoan ((hoc mai) OR (hoc ma)) hoi dap thanh phan*.