Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, hanh mang, hanh tung
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - ((hanh tang) or (anh tang)) luan dung cong dan ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((hanh tang) OR (anh tang)) luan dung cong dan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((hanh tang) or (anh tang)) luan dung cong dan ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh tang) or (anh tang)) luan dung cong dan ((toan cau) OR (toan cao))*.