Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » hanh chinh
hoc thieu » toc thieu, hoc hien
qua nhung » quan nhung, cua nhung, qua chung
cong tac » cong ty
song van » hoang van, trong van, duong van
toan tap » toan 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 - ((hanh trinh) OR (canh tranh)) qua nhung ((cong tac) or (song van)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((hanh trinh) OR (canh tranh)) qua nhung ((cong tac) OR (song van)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((hanh trinh) OR (canh tranh)) qua nhung ((cong tac) or (song van)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((hanh trinh) OR (canh tranh)) qua nhung ((cong tac) or (song van)) toan tap*.