Perhaps you should try some spelling variations:
luan phuong » lan phuong, quang phuong, luat thuong
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu tinh » lieu tinh, kieu tinh, hieu binh
hanh dung » thanh dung, anh dung, hanh dong
luong dan » huong dan, luong dao, luong van
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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 tinh) OR (chieu tinh)) - hanh dung ((luan phuong) or (doan phuong)) luong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu tinh) OR (chieu tinh)) - hanh dung ((luan phuong) OR (doan phuong)) luong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu tinh) OR (chieu tinh)) - hanh dung ((luan phuong) or (doan phuong)) luong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu tinh) OR (chieu tinh)) - hanh dung ((luan phuong) or (doan phuong)) luong dan toan cau*.