Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien hach » hien hanh
tuan nhung » quan nhung, tuan hung, thuat nhung
nhung cong » dung cong, thong cong, hang cong
hanh tran » hanh trang, thanh tran, hanh tram
tran tuan » tran xuan, tran quang, tran thanh
dan toan » van toan, manh toan, xuan toan
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 ((thien hach) OR (thien thanh)) - hanh tran tuan nhung cong ((dan toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (thien thanh)) - hanh tran tuan nhung cong ((dan toan) OR (dan than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien hach) OR (thien thanh)) - hanh tran tuan nhung cong ((dan toan) or (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) OR (thien thanh)) - hanh tran tuan nhung cong ((dan toan) or (dan than)) cau*.