Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hanh tinh » nhanh tinh, thanh tinh, canh tinh
chu nang » chuc nang, chua nang, cuu nang
van tuan » van quan, van ban, anh tuan
tuan tai » toan tai, quan tai, tan tai
tho chu » theo chu, cho chu, ho chu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tho chu nang - ((hanh tinh) OR (hanh trinh)) cua ((nhung cong) or (thong cong)) van tuan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tho chu nang - ((hanh tinh) OR (hanh trinh)) cua ((nhung cong) OR (thong cong)) van tuan tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tho chu nang - ((hanh tinh) OR (hanh trinh)) cua ((nhung cong) or (thong cong)) van tuan tai".
• Adding a wildcard symbol may retrieve word variants: tho chu nang - ((hanh tinh) OR (hanh trinh)) cua ((nhung cong) or (thong cong)) van tuan tai*.