Perhaps you should try some spelling variations:
cong khanh » cong thanh, cong khan, cong nhan
chieu sang » chieu sach, chieu xanh, nhieu tang
hanh trinh » canh tranh, hanh chinh
trinh chat » tinh chat, trinh luat, trinh han
hieu lang » hieu quang, nhieu tang, hieu van
khanh sua » hanh sua, khanh luan, khanh hoa
dong hanh » dong thanh, dang hanh, hong hanh
sua cong » cua cong, qua cong, su cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu lang) or (chieu sang)) - cong khanh sua cong dong hanh trinh chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (chieu sang)) - cong khanh sua cong dong hanh trinh chat.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (chieu sang)) - cong khanh sua cong dong hanh trinh chat*.