Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
sach moi » sach doi, sach hoi, bach mai
cuu cong » cua cong, thu cong, cac cong
cong dot » cong mot, cong dong, cong doan
dan khai » dang khai, van khai, dang khoi
vu sach » vu bach, su sach, vu khach
moi tap » moi tai, toi tap
dot dan » do dan, doi dan, dong dan
dan hoa » danh hoa, dan hoat, dan khoa
va khai » van khai, va khao, va kha

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 moi tap, nghien cuu cong dot dan hoa hoc ((va khai) or (dan khai)) van thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach moi tap, nghien cuu cong dot dan hoa hoc ((va khai) OR (dan khai)) van thanh van.
• Adding a wildcard symbol may retrieve word variants: vu sach moi tap, nghien cuu cong dot dan hoa hoc ((va khai) or (dan khai)) van thanh van*.