Perhaps you should try some spelling variations:
quyen tinh » tuyen tinh, huyen tinh, quyen dinh
tuan nhung » quan nhung, tuan hung, thuat nhung
hoc quyen » hoc chuyen, hoc truyen, hoc quan
hanh tran » hanh trang, thanh tran, hanh tram
tran tuan » tran xuan, tran quang, tran thanh
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc quyen tinh - hanh tran tuan nhung ((cong dan) OR (cong san)) ((van ban) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc quyen tinh - hanh tran tuan nhung ((cong dan) OR (cong san)) ((van ban) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc quyen tinh - hanh tran tuan nhung ((cong dan) OR (cong san)) ((van ban) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc quyen tinh - hanh tran tuan nhung ((cong dan) OR (cong san)) ((van ban) or (toan cao))*.