Perhaps you should try some spelling variations:
thang nguoi » thanh nguoi, thong nguoi, nhung nguoi
tang nguoi » tang nguon, nang nguoi, thanh nguoi
tranh cac » trinh cac, thanh cac, tranh cai
chi sang » chi lang, chieu sang, chi chang
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
doi chi » doi khi

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 sang - canh tranh cac ((thang nguoi) or (tang nguoi)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sang - canh tranh cac ((thang nguoi) OR (tang nguoi)) dan toan cau*.