Perhaps you should try some spelling variations:
trung thuoc » trung thuc, trung quoc, dung thuoc
tieu hanh » dieu hanh, tiem hanh, tien hanh
trung hoc » trung quoc
bang cong » bang song, hang cong, dung cong
dang cong » dung cong
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu hanh - thanh ((trung thuoc) OR (trung hoc)) ((bang cong) or (dang cong)) dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu hanh - thanh ((trung thuoc) OR (trung hoc)) ((bang cong) OR (dang cong)) dan than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu hanh - thanh ((trung thuoc) OR (trung hoc)) ((bang cong) or (dang cong)) dan than cap".
• Adding a wildcard symbol may retrieve word variants: theo tieu hanh - thanh ((trung thuoc) OR (trung hoc)) ((bang cong) or (dang cong)) dan than cap*.