Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
cuu cong » cua cong, thu cong, cac cong
cong moi » cong goi, cong mi, cong mot
vu sach » su sach, vu khach
moi tap » moi tai, toi tap
moi dan » moi dang, hoi dan, doi dan
dan hoa » danh hoa, dan hoat, dan khoa
hai ban » hai bang, hai ba, tai ban
va hai » van hai, va chai, va khai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (vu bach)) moi tap, nghien cuu cong moi dan hoa hoc va hai ban thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu bach)) moi tap, nghien cuu cong moi dan hoa hoc va hai ban thanh van".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu bach)) moi tap, nghien cuu cong moi dan hoa hoc va hai ban thanh van*.