Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
canh trinh » canh tranh, hanh trinh, canh tinh
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
ho lieu » so lieu, co lieu, ho chieu
ho kieu » so kieu, thi kieu, ho chieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho lieu) OR (ho kieu)) tinh - canh trinh va nhung cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho lieu) OR (ho kieu)) tinh - canh trinh va nhung cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho lieu) OR (ho kieu)) tinh - canh trinh va nhung cong dan toan cao*.