Perhaps you should try some spelling variations:
thi cong » tai cong, thien cong
cach tu » cach thuc
te cong » tai cong, thu cong
cac che » cac he, cac chien, cac chat
cac khu » cac thu, cac khoi, cac kieu
ban ke » ban kem, ban ve, ban le
ke mo » ke o, ke co, ke do
tuyen » truyen, quyen

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

• Performing a fuzzy search may retrieve terms with similar spellings: tuyen tap ((((cac che) or (cac khu))) or (cach tu)) đe co ban ke mo ((te cong) OR (thi cong)) cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tuyen tap ((((cac che) OR (cac khu))) OR (cach tu)) đe co ban ke mo ((te cong) OR (thi cong)) cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tuyen tap ((((cac che) or (cac khu))) or (cach tu)) đe co ban ke mo ((te cong) OR (thi cong)) cong".
• Adding a wildcard symbol may retrieve word variants: tuyen tap ((((cac che) or (cac khu))) or (cach tu)) đe co ban ke mo ((te cong) OR (thi cong)) cong*.