Perhaps you should try some spelling variations:
thanh thanh » thanh toan, thanh phan, phan thanh
nhanh thanh » phan thanh, nhanh tinh
nhieu tang » chieu sang, hieu lang, nhiet nang
chieu xanh » chieu sach, chieu sang, chieu tinh
thong bai » thong tai, nhung bai, thong xay
bai toan » bai tap
toan tap » toan 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 ((nhieu tang) or (chieu xanh)) - ((thanh thanh) OR (nhanh thanh)) he thong thong bai toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((nhieu tang) OR (chieu xanh)) - ((thanh thanh) OR (nhanh thanh)) he thong thong bai toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((nhieu tang) or (chieu xanh)) - ((thanh thanh) OR (nhanh thanh)) he thong thong bai toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((nhieu tang) or (chieu xanh)) - ((thanh thanh) OR (nhanh thanh)) he thong thong bai toan tap*.