Perhaps you should try some spelling variations:
thang nguoi » thanh nguoi, tang nguoi, nhung nguoi
thong nguoi » nhung nguoi, hon nguoi, tho nguoi
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
chinh cua » chinh ca, chinh sua, hinh cua
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (chieu sang)) - hanh chinh cua ((thang nguoi) OR (thong nguoi)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - hanh chinh cua ((thang nguoi) OR (thong nguoi)) dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (chieu sang)) - hanh chinh cua ((thang nguoi) OR (thong nguoi)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu sang)) - hanh chinh cua ((thang nguoi) OR (thong nguoi)) dan toan cao*.