Perhaps you should try some spelling variations:
hanh trinh » canh tranh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong vinh » cong trinh, trong vinh, cong viec
vinh toan » tinh toan, hinh toan, minh toan
chao chu » cho chu, cua chu, cao cho
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, vat dung

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: ((chao chu) OR (hoc thieu)) sang - ((hanh trinh) OR (hanh chinh)) va dung cong vinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((chao chu) or (hoc thieu)) sang - ((hanh trinh) OR (hanh chinh)) va dung cong vinh toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((chao chu) or (hoc thieu)) sang - ((hanh trinh) OR (hanh chinh)) va dung cong vinh toan cau*.