Perhaps you should try some spelling variations:
hanh manh » hanh mang, lanh manh, hoang manh
dang cong » dung cong
theo thu » theo chu, theo tu, theo tieu
thu sach » tu sach, thuat sach, thuoc sach
manh cua » doanh cua, ban cua
cua dang » cua cong, cua ban
van toan » van tuan, van tan, van thanh
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo thu sach - hanh manh cua dang cong ((van toan) or (dan chan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo thu sach - hanh manh cua dang cong ((van toan) OR (dan chan)) cao*.