Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » hanh chinh
trung cong » truong cong, trong cong, trung uong
hoc thieu » toc thieu, hoc hien
cua trung » cua truong, xuan trung, cua nhung
cong van » cong vang, cong san, song van
toan cao » toan tap
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: hoc thieu xanh - ((canh tranh) or (hanh trinh)) cua trung cong van ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((canh tranh) OR (hanh trinh)) cua trung cong van ((toan cao) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((canh tranh) or (hanh trinh)) cua trung cong van ((toan cao) OR (toan ban))*".