Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung thanh, trung tam, truong thanh
tuan dung » tuan duong, tran dung, tan dung
dung cong » dung trong
tran tuan » tran quang, tran thanh, tranh luan
tran xuan » tran quang, tran van
cong tac » cong ty

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) or (chinh sach)) - thanh trung tuan dung cong tac ((tran tuan) OR (tran xuan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chinh sach)) - thanh trung tuan dung cong tac ((tran tuan) OR (tran xuan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (chinh sach)) - thanh trung tuan dung cong tac ((tran tuan) OR (tran xuan))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (chinh sach)) - thanh trung tuan dung cong tac ((tran tuan) OR (tran xuan))*.