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
dong cong » duong cong, dang cong, cong cong
dung cong » dung trong
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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