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

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 (trang va)) nang cong tap toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh ((tang va) OR (trang va)) nang cong tap toan ban".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh ((tang va) OR (trang va)) nang cong tap toan ban*.