Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
truong he » truong nghe, truong thi, truong hoc
trong he » trong le, trong hiep, trong nha
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 - thanh ((truong he) OR (trong he)) thong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho lieu) OR (ho kieu)) tinh - thanh ((truong he) OR (trong he)) thong cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho lieu) or (ho kieu)) tinh - thanh ((truong he) OR (trong he)) thong cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho lieu) or (ho kieu)) tinh - thanh ((truong he) OR (trong he)) thong cong dan toan cao*.