Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
van cong » van dong, van phong, phan cong
cong van » cong vang, cong san, song van
toan cao » toan ban
toan tap » toan ban
cua van » cua ban, cua vat, cua dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((dieu hanh) or (hieu lang)) - manh trung cua van cong van ((toan cao) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (hieu lang)) - manh trung cua van cong van ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((dieu hanh) or (hieu lang)) - manh trung cua van cong van ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (hieu lang)) - manh trung cua van cong van ((toan cao) OR (toan tap))*.