Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, tien anh, thien thanh
ninh viet » sinh vien, anh viet
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dieu hanh) or (thien anh)) - hanh ((ninh viet) or (trinh va)) nhung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (thien anh)) - hanh ((ninh viet) OR (trinh va)) nhung cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (thien anh)) - hanh ((ninh viet) or (trinh va)) nhung cong dan than cau*.