Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
dang cong » dung cong
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
doc hieu » toc thieu, hoc thieu, hoc hien
toan cau » toan cao, toan ban, toan tap
manh va » hanh va, anh va, lanh va
minh va » tinh va, sinh va, sinh vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (theo chieu)) xanh - lanh ((manh va) OR (minh va)) dang cong danh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo chieu)) xanh - lanh ((manh va) OR (minh va)) dang cong danh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (theo chieu)) xanh - lanh ((manh va) OR (minh va)) dang cong danh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo chieu)) xanh - lanh ((manh va) OR (minh va)) dang cong danh toan cau*.