Perhaps you should try some spelling variations:
chieu manh » chieu xanh, hieu manh, chieu sach
thong cong » trong cong, tong cong, thong thong
chu manh » ho manh, chu han, chu van
anh tang » anh bang, anh dang, anh nang
va thong » va thuong, va phuong, he thong
cong tan » cong tac, cong san, cong thanh
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
tang va » trang va, tang van, thang va

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) OR (chu manh)) - anh tang va thong cong tan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu manh) OR (chu manh)) - anh tang va thong cong tan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu manh) OR (chu manh)) - anh tang va thong cong tan ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu manh) OR (chu manh)) - anh tang va thong cong tan ((toan cau) or (toan cao))*.