Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, diep quang
hanh mang » nhanh mang, hanh trang, nhanh lang
ban cong » bang cong, van cong, phan cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh 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: hoi ((hieu quang) or (hieu qua)) - ((thanh trung) or (hanh mang)) cua ban cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((hieu quang) OR (hieu qua)) - ((thanh trung) OR (hanh mang)) cua ban cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoi ((hieu quang) or (hieu qua)) - ((thanh trung) or (hanh mang)) cua ban cong dan toan ban*.