Perhaps you should try some spelling variations:
khoang trong » hoang trong, duong trong, cong trong
khong thong » thong thong, khong trong, thong thuong
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
trung cua » truong cua, trung tuan, trung cap
ho chieu » theo chieu, hoc thieu, doi chieu
phan dau » phan tu
hang dau » hang va, hang tai

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 - thanh trung cua ((khong thong) or (khoang trong)) van ((phan dau) OR (hang dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh trung cua ((khong thong) OR (khoang trong)) van ((phan dau) OR (hang dau))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - thanh trung cua ((khong thong) or (khoang trong)) van ((phan dau) OR (hang dau))*".