Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
anh trong » anh thuong, dinh trong, lang trong
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
cac dung » cach dung, cac duong, tac dung
than tap » toan tap, phan tap, than cap
han tap » han tai, toan tap, nhan tai

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 xanh - anh trong cac dung cong vang ((than tap) or (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - anh trong cac dung cong vang ((than tap) OR (han tap)).
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - anh trong cac dung cong vang ((than tap) or (han tap))*.