Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
canh trinh » canh tranh, hanh trinh, canh tinh
cai thuong » tai thuong, ca thuong, hai thuong
cao thuong » cao truong, ca thuong, cho thuong
toan cao » toan ban, toan tap
ho tinh » hoi tinh, hoa tinh, tho tinh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (chieu sang)) - canh trinh ((cai thuong) OR (cao thuong)) ho tinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sang)) - canh trinh ((cai thuong) OR (cao thuong)) ho tinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sang)) - canh trinh ((cai thuong) OR (cao thuong)) ho tinh toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sang)) - canh trinh ((cai thuong) OR (cao thuong)) ho tinh toan cao*.