Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
doc hieu » toc thieu, hoc thieu, hoc hien
van dung » xay dung, tin dung
toan ban » van ban

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

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