Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trang » thanh trung, canh tranh, hanh trinh
trinh toan » tinh toan, thanh toan, trinh han
hanh tang » anh tang, hanh mang, hanh tung
toan ban » van ban
cua chu » sua chua
chu han » chu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: cua chu han - ((hanh tang) or (hanh trang)) va nhung cong trinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cua chu han - ((hanh tang) OR (hanh trang)) va nhung cong trinh toan ban.
• Adding a wildcard symbol may retrieve word variants: cua chu han - ((hanh tang) or (hanh trang)) va nhung cong trinh toan ban*.