Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
thong cong » trong cong, tong cong, thong thong
cung dung » cuong dung, ung dung, cung ung
trinh va » trinh van, trinh vat, trinh ve
pho cau » pho cap, pha cau, pho cam

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