Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
thong tong » thong thong, thong trong, thong cong
chinh ca » chinh ta, chinh va, chinh tai
ca thong » ca thuong, va thong, ca trong
tong bai » thong bai, trong bai, tong tai
bai toan » bai 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: doi ((chieu sang) or (chieu xanh)) - hanh chinh ca thong tong bai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (chieu xanh)) - hanh chinh ca thong tong bai toan ban.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (chieu xanh)) - hanh chinh ca thong tong bai toan ban*.