Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
tuan nhung » quan nhung, tuan hung, thuat nhung
phuong dan » phuong danh, phuong doan, huong dan
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thanh tra » thanh toan, thanh hoa
tran hung » tran hong, tran quang, tran hoang
dan thanh » dang thanh, danh thanh, ban thanh

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 tra ((tuan nhung) or (tran hung)) phuong dan thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - thanh tra ((tuan nhung) OR (tran hung)) phuong dan thanh san.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh tra ((tuan nhung) or (tran hung)) phuong dan thanh san*.