Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
thiet tach » chiet tach, thien hach, thuat tach
nhung cong » dung cong, thong cong, nhung don
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hang cong » dang cong, hang nong, bang cong
tan thanh » tran thanh, tang thanh, toan thanh
thong va » thong cua, truong va, thong qua
tan than » tan tran, ban than, tam than

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 - thanh thong va ((nhung cong) or (hang cong)) ((tan than) OR (tan thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - thanh thong va ((nhung cong) OR (hang cong)) ((tan than) OR (tan thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - thanh thong va ((nhung cong) or (hang cong)) ((tan than) OR (tan thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh thong va ((nhung cong) or (hang cong)) ((tan than) OR (tan thanh)) cau*.