Perhaps you should try some spelling variations:
thang nguoi » thanh nguoi, thong nguoi, tang nguoi
hieu quang » thieu quang, hieu quan, hieu qua
chieu sang » chieu sach, chieu xanh, hieu lang
nguoi van » nguoi san, nguoi dan, nguoi va
chinh su » hinh su, chinh phu, chinh ta
su thang » su thanh, su khang, duc thang
toan cao » toan tap
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: ho ((hieu quang) or (chieu sang)) - hanh chinh su thang nguoi van ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (chieu sang)) - hanh chinh su thang nguoi van ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quang) or (chieu sang)) - hanh chinh su thang nguoi van ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (chieu sang)) - hanh chinh su thang nguoi van ((toan cao) OR (toan ban))*.