Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
hanh trinh » canh tranh
dung cong » dung trong
hoc tien » hoc tieng, hoc hien, hoc vien
cua dung » cua dang, cua dong, qua dung
van tuan » van quan, van ban, anh tuan
dan than » dan chan, ban than, van 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 tien thanh - ((hanh trinh) or (hanh chinh)) cua dung cong ((van tuan) or (dan than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien thanh - ((hanh trinh) OR (hanh chinh)) cua dung cong ((van tuan) OR (dan than)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc tien thanh - ((hanh trinh) or (hanh chinh)) cua dung cong ((van tuan) or (dan than)) ban*.