Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trang, lanh tranh
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tan chan » dan chan, ban chan, can chan
chan cau » phan cau, can cau, chinh cau
chu han » chu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho ((chieu sang) or (chu han)) - ((hanh tranh) or (hanh trinh)) cua dung cong tan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho ((chieu sang) OR (chu han)) - ((hanh tranh) OR (hanh trinh)) cua dung cong tan chan cau.
• Adding a wildcard symbol may retrieve word variants: cho ((chieu sang) or (chu han)) - ((hanh tranh) or (hanh trinh)) cua dung cong tan chan cau*.