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

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (hoc thieu)) sach - hanh trinh su dung cong ((dan than) or (van thanh)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (hoc thieu)) sach - hanh trinh su dung cong ((dan than) OR (van thanh)) ban.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (hoc thieu)) sach - hanh trinh su dung cong ((dan than) or (van thanh)) ban*.