Perhaps you should try some spelling variations:
hanh trong » hanh trang, anh trong, hinh trong
dang cong » dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
chao chu » cho chu, cua chu, cao cho
cac dang » cao dang, cac dan, cac cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (chao chu)) sang - hanh trong cac dang cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (chao chu)) sang - hanh trong cac dang cong tac toan cau*.