Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
trung hoc » trung quoc
dung cong » dung trong
ho chieu » theo chieu, doi chieu, mot chieu
trung ha » trung tam, trung cap
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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 (hoc thieu)) xanh - thanh ((trung ha) OR (trung hoc)) dung cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - thanh ((trung ha) OR (trung hoc)) dung cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - thanh ((trung ha) OR (trung hoc)) dung cong dan toan cao*.