Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
tra trinh » qua trinh
cuu hanh » cuu thanh, luu hanh, cuu anh
trinh su » trinh tu, trinh san, trinh cau
don gian » dan gian
ta trinh » tao trinh, va trinh, lap trinh
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: (( cuu hanh trinh su - don gian ) or ( ((ta trinh) or (tra trinh)) lich su - toan cao ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cuu hanh trinh su - don gian ) OR ( ((ta trinh) OR (tra trinh)) lich su - toan cao )).
• Adding a wildcard symbol may retrieve word variants: (( cuu hanh trinh su - don gian ) or ( ((ta trinh) or (tra trinh)) lich su - toan cao ))*.