Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hanh manh » hanh mang, lanh manh, hoang manh
dung cong » dung trong
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tai
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 ((hieu lang) or (dieu hanh)) - hanh manh cua dung cong tan ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (dieu hanh)) - hanh manh cua dung cong tan ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) or (dieu hanh)) - hanh manh cua dung cong tan ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (dieu hanh)) - hanh manh cua dung cong tan ((toan cau) OR (toan tap))*.