Perhaps you should try some spelling variations:
thanh hang » thanh hoang, thanh thang, tranh hang
trinh toan » tinh toan, thanh toan, trinh han
lang cong » dang cong, bang cong, hang cong
chi xanh » chi anh, chi hanh, chieu xanh
chi danh » chi dan, chi anh, chi dinh
toan tap » toan ban
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi xanh) or (chi danh)) - thanh hang va lang cong trinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi danh)) - thanh hang va lang cong trinh toan tap*.