Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
theo chieu » theo tieu, ho chieu, theo chu
song tinh » cong tinh, long tinh, dong tinh
doc hieu » toc thieu, hoc thieu, hoc hien
chu bang » thu bang, chuc nang, chu quang
cuu nang » chuc nang, cam nang, cuu van
toan cao » toan ban, toan tap

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 (doc hieu)) xanh - hanh trinh ((chu bang) or (cuu nang)) song tinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doc hieu)) xanh - hanh trinh ((chu bang) OR (cuu nang)) song tinh toan cao.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doc hieu)) xanh - hanh trinh ((chu bang) or (cuu nang)) song tinh toan cao*.