Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu manh » chieu xanh, hieu manh, chu manh
tang vat » tang van, dang vat, bang vat
trang va » tran van, hang va
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu manh - anh ((tang vat) or (trang va)) hang ((cong dan) OR (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu manh - anh ((tang vat) OR (trang va)) hang ((cong dan) OR (cong san)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu manh - anh ((tang vat) or (trang va)) hang ((cong dan) OR (cong san)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu manh - anh ((tang vat) or (trang va)) hang ((cong dan) OR (cong san)) toan tap*.