Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
thanh tung » thanh cong
ho chieu » theo chieu, hoc thieu, doi chieu
vat cong » bat cong, sat cong, vat con
cong tam » cong tac, cong tan, cong nam
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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 sang - ((hanh trinh) or (thanh tung)) cua vat cong tam ((than cau) OR (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((hanh trinh) OR (thanh tung)) cua vat cong tam ((than cau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - ((hanh trinh) or (thanh tung)) cua vat cong tam ((than cau) OR (phan cau))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((hanh trinh) or (thanh tung)) cua vat cong tam ((than cau) OR (phan cau))*.