Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, mot chieu
dung cong » dung trong
dang toan » dang tran, dan toan, dung toan
ho chieu » theo chieu, hoc thieu, mot chieu
trinh va » trinh van, trinh vat, trinh ve
toan cau » 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: ((ho chieu) or (doi chieu)) xanh - hanh trinh va ((dung cong) or (thong cong)) dang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - hanh trinh va ((dung cong) OR (thong cong)) dang toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - hanh trinh va ((dung cong) or (thong cong)) dang toan cau*.