Perhaps you should try some spelling variations:
trinh duoc » trinh doc, trinh duc, trinh quoc
hanh trinh » canh tranh, hanh chinh
mot chieu » doi chieu, ho chieu
dinh cong » dinh cuong, dinh hong, dinh long
sinh cong » minh cong, trinh cong, chinh cong
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (hoc hien)) xanh - hanh trinh duoc ((dinh cong) or (sinh cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (hoc hien)) xanh - hanh trinh duoc ((dinh cong) OR (sinh cong)) dan toan ban.
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (hoc hien)) xanh - hanh trinh duoc ((dinh cong) or (sinh cong)) dan toan ban*.