Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
nang cong » nang song, dang cong, bang cong
tang van » dang van, hoang van, trong van
trang va » tran van, hang va
cong tap » cuong tap, cong tac, cong tan
tang va » thang va, tang vat, hang va
tap van » tap va, tap vat, tap quan

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 - hanh ((((tang va) or (tang van))) or (trang va)) nang cong tap van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh ((((tang va) OR (tang van))) OR (trang va)) nang cong tap van ban.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh ((((tang va) or (tang van))) or (trang va)) nang cong tap van ban*.