Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hien anh » hien hanh, thien anh, dien anh
anh nang » ganh nang, anh bang, anh dang
nang cua » mang cua, hang cua, nang dua
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
chan tap » han tap, phan tap, chan ta

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien anh) or (thien thanh)) - anh nang cua dung ((cong dan) OR (cong tan)) chan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien anh) OR (thien thanh)) - anh nang cua dung ((cong dan) OR (cong tan)) chan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien anh) or (thien thanh)) - anh nang cua dung ((cong dan) OR (cong tan)) chan tap*".