Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » hanh chinh
luat thong » luat thuong, xuat thong, luat trong
hoc thieu » toc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan nan » chan nhan, chang nang, chan doan

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)) ((luat thong) OR (suat thong)) cong dan chan nan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((hanh trinh) OR (canh tranh)) ((luat thong) OR (suat thong)) cong dan chan nan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((hanh trinh) or (canh tranh)) ((luat thong) OR (suat thong)) cong dan chan nan".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((hanh trinh) or (canh tranh)) ((luat thong) OR (suat thong)) cong dan chan nan*.