Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong tan » cong tac, cong san, cong thanh
chan cau » phan cau, can cau, chinh cau
phan lap » phan dau

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 tranh cua nhung ((cong tan) or (cong trinh)) ((chan cau) or (phan lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh tranh cua nhung ((cong tan) OR (cong trinh)) ((chan cau) OR (phan lap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh tranh cua nhung ((cong tan) or (cong trinh)) ((chan cau) or (phan lap))*.