Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
trung vap » trung cap, trung va, trung van
hang cong » dang cong, hang nong, bang cong
vap hang » van hang, va hang, van khang
cong tan » cong tac, cong san, cong thanh
chan cau » phan cau, can cau, chinh cau
ban cau » bang cau, ban can, van cau

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) OR (chieu sach)) - thanh trung vap hang cong tan ((chan cau) or (ban cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - thanh trung vap hang cong tan ((chan cau) OR (ban cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (chieu sach)) - thanh trung vap hang cong tan ((chan cau) or (ban cau))".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (chieu sach)) - thanh trung vap hang cong tan ((chan cau) or (ban cau))*.