Perhaps you should try some spelling variations:
van thanh » van tuan
ban thanh » ban hanh, ban hang
sach toi » sach doi, sach hoi, sach moi
cuu cong » cua cong, thu cong, cac cong
cong moi » cong goi, cong mi, cong mot
vu sach » vu bach, su sach, vu khach
toi gap » toi tap, toi gian
moi dan » moi dang, hoi dan, doi dan
dan hoa » danh hoa, dan hoat, dan khoa
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 toi gap, nghien cuu cong moi dan hoa hoc va hai ((van thanh) OR (ban thanh)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach toi gap, nghien cuu cong moi dan hoa hoc va hai ((van thanh) OR (ban thanh)) van".
• Adding a wildcard symbol may retrieve word variants: vu sach toi gap, nghien cuu cong moi dan hoa hoc va hai ((van thanh) OR (ban thanh)) van*.