Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
van nang » van quang, van ban, van dong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan tap » toan ban
hoa van » hoa dan, hoang van, hoa phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - hanh trinh ((hoa van) or (van nang)) cong tap toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - hanh trinh ((hoa van) OR (van nang)) cong tap toan tap.
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - hanh trinh ((hoa van) or (van nang)) cong tap toan tap*.