Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien dang » thien bang, thien danh, thien nang
quang van » quang ban, quan van, quang uan
van luong » van duong, van cuong, nang luong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cau » 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 ((thien thanh) or (thien dang)) - nhanh quang van luong ((cong dan) OR (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (thien dang)) - nhanh quang van luong ((cong dan) OR (cong tan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) or (thien dang)) - nhanh quang van luong ((cong dan) OR (cong tan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (thien dang)) - nhanh quang van luong ((cong dan) OR (cong tan)) toan cau*.