Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
hoc chieu » hoc thieu, ho chieu, hoc hien
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sang - ((thanh trung) OR (thanh tung)) quan dung cong manh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - ((thanh trung) OR (thanh tung)) quan dung cong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - ((thanh trung) OR (thanh tung)) quan dung cong manh toan ban*.