Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
nhung cong » dung cong, hang cong, nhung don
thong cong » tong cong, thong thong, phong chong
hoc thieu » toc thieu, hoc hien
toan cau » toan cao, toan ban, toan tap

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