Perhaps you should try some spelling variations:
thanh trung » thanh tung
khien tinh » thien tinh, khien thich, bien tinh
nhung cong » dung cong, thong cong, hang cong
hien tinh » thien tinh, bien tinh, dien tinh
trung cap » truong cao, trung tam
cap nhung » cam nhung, vap nhung, dap nhung
cong san » cong tac
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien tinh) OR (khien tinh)) - thanh trung cap nhung cong san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien tinh) OR (khien tinh)) - thanh trung cap nhung cong san ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien tinh) OR (khien tinh)) - thanh trung cap nhung cong san ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien tinh) OR (khien tinh)) - thanh trung cap nhung cong san ((toan cao) or (toan ban))*.