Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
theo chua » theo chu, ho chua, cheo cua
chua nang » chuc nang, chua xang, kha nang
hanh hang » thanh hang, hanh han, hanh mang
hang hang » nang hang, cang thang, hung thang
cua thong » cua thuong, cua khong, cua tong
dan than » dan chan, ban than, van than

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chua nang - ((hanh hang) OR (hang hang)) cua thong cong ((tinh toan) OR (dan than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chua nang - ((hanh hang) OR (hang hang)) cua thong cong ((tinh toan) or (dan than)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo chua nang - ((hanh hang) OR (hang hang)) cua thong cong ((tinh toan) or (dan than)) cau*.