Perhaps you should try some spelling variations:
tcong thanh » thong thanh, trong thanh, truong thanh
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
cong thanh » dong thanh, cong trinh, cong tan
tranh qua » tranh cua, thanh qua, trinh qua
qua dung » quang dung, su dung, qua song
toan tai » toan tap, doanh tai, toan cao
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: theo chieu sang - canh tranh qua dung ((tcong thanh) or (cong thanh)) ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - canh tranh qua dung ((tcong thanh) OR (cong thanh)) ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - canh tranh qua dung ((tcong thanh) or (cong thanh)) ((toan tai) or (toan ban))*.