Perhaps you should try some spelling variations:
thuong luong » theo luong, cong luong
thong thuong » thong thong, hang thuong, cong thuong
hieu tinh » chieu tinh, lieu tinh, hieu binh
kieu tinh » lieu tinh, trieu tinh, diep tinh
hanh dung » thanh dung, anh dung, hanh dong
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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