Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
theo yeu » thiet yeu, theo chu
trinh su » trinh tu, trinh san, trinh cau
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
tuan cau » toan cau, quan cau, tuan cu

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

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