Perhaps you should try some spelling variations:
nhung cuong » nhung cong, hung cuong, nhung chong
thac quang » thai quang, than quang, thau quang
tac quang » tac quan, tai quang, tao quang
chi xanh » chi anh, chi danh, chieu xanh
chi hanh » chi nhanh, chi thanh, thi hanh
chinh va » chinh ta, chinh tai, hanh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi xanh) or (chi hanh)) - hanh chinh va nhung cuong ((tac quang) OR (thac quang)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi hanh)) - hanh chinh va nhung cuong ((tac quang) OR (thac quang)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi xanh) or (chi hanh)) - hanh chinh va nhung cuong ((tac quang) OR (thac quang)) cao".
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) or (chi hanh)) - hanh chinh va nhung cuong ((tac quang) OR (thac quang)) cao*.