Perhaps you should try some spelling variations:
thiet hach » thien hach, thuyet hach, thiet hai
hoc thiet » hoc thieu, hoc thuyet, hoc hien
chinh tan » chinh tai, chinh ta, chinh ban
dung cong » dung trong
tan dung » tran dung, tin dung, van dung
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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 - hanh chinh tan dung cong dan than ban~.
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - hanh chinh tan dung cong dan than ban*.