Perhaps you should try some spelling variations:
hanh trinh » canh tranh
hoc thieu » toc thieu, hoc hien
ho chieu » theo chieu, doi chieu, mot chieu
quan han » quan hanh, quanh han, quan ha
tong tan » trong tan, cong tan, tong tap
tan toan » tan tran, tap toan, van 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: ((ho chieu) or (hoc thieu)) xanh - ((hanh trinh) OR (hanh chinh)) quan han tong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - ((hanh trinh) OR (hanh chinh)) quan han tong tan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) xanh - ((hanh trinh) OR (hanh chinh)) quan han tong tan toan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - ((hanh trinh) OR (hanh chinh)) quan han tong tan toan ban*.