Perhaps you should try some spelling variations:
tieu sang » chieu sang, tieu dung, tiem nang
hanh dung » thanh dung, anh dung, hanh dong
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
anh tang » anh bang, anh dang, anh nang
qua dung » quang dung, su dung, qua song
vang ban » van ban, hang ban, nang ban
ban can » ban dan, ban hang, ban hanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sang - ((hanh dung) or (anh tang)) qua dung cong vang ban can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - ((hanh dung) OR (anh tang)) qua dung cong vang ban can.
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - ((hanh dung) or (anh tang)) qua dung cong vang ban can*.