Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
cong thanh » dong thanh, cong trinh, cong tan
thanh phan » thanh pho, thanh san, thanh toan
tinh tran » tinh trang, tinh toan, tinh than
tran khoa » toan khoa, san khoa, nhan khoa
khoa dung » hoc dung, khoa cong
dung cong » dung trong
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 nhi) or (((chieu xanh) or (chieu sang)))) - tinh tran khoa dung cong thanh phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu nhi) OR (((chieu xanh) OR (chieu sang)))) - tinh tran khoa dung cong thanh phan lap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu nhi) or (((chieu xanh) or (chieu sang)))) - tinh tran khoa dung cong thanh phan lap*.