Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet hach » thien hach, thuyet hach, thiet hai
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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 thiet hach - thanh trung ((cua nhung) or (cua ban)) cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet hach - thanh trung ((cua nhung) OR (cua ban)) cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - thanh trung ((cua nhung) or (cua ban)) cong dan toan ban*.