Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
cong thanh » dong thanh, cong trinh, cong tan
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trong qua » trong quan, trong nha, duong qua
thong qua » thong quan, thong cua, thong tu
dung cong » dung trong
thanh hoa » thanh pho
hoa ban » hoa dan, hoa van, hoa han

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 tach - hanh ((trong qua) or (thong qua)) dung cong thanh hoa ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - hanh ((trong qua) OR (thong qua)) dung cong thanh hoa ban*.