Perhaps you should try some spelling variations:
bang thong » mang thong, ban thong, bang tuong
hanh trinh » canh tranh, hanh chinh
doc hieu » toc thieu, hoc thieu, hoc hien
trinh tu » trinh ky, trinh do
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
tu bang » thu bang, tu ban, te bang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (doc hieu)) xanh - hanh trinh tu bang thong tin ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (doc hieu)) xanh - hanh trinh tu bang thong tin ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (doc hieu)) xanh - hanh trinh tu bang thong tin ((toan cau) or (toan tap))*.