Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong trinh, cong tan
hoc chieu » hoc thieu, ho chieu, hoc hien
chon cac » cho cac, thong cac, hoc cac
hoa cau » hoa cac, hoa dau, hoa mau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu xanh - hanh tranh ((cua nhung) or (va nhung)) cong thanh ((hoa cau) or (chon cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh tranh ((cua nhung) OR (va nhung)) cong thanh ((hoa cau) OR (chon cac)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh tranh ((cua nhung) or (va nhung)) cong thanh ((hoa cau) or (chon cac))*.