Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
van thanh » ban thanh, van tuan
ho chieu » theo chieu, doi chieu, mot chieu
trinh su » trinh tu, trinh san, trinh cau
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (hoc thieu)) sach - hanh trinh su dung cong ((dan toan) or (van thanh)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - hanh trinh su dung cong ((dan toan) OR (van thanh)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sach - hanh trinh su dung cong ((dan toan) or (van thanh)) ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sach - hanh trinh su dung cong ((dan toan) or (van thanh)) ban*.