Perhaps you should try some spelling variations:
thuong luong » theo luong, thong thuong
cong luong » cong thuong, nang luong, cong dong
hieu tinh » chieu tinh, lieu tinh, hieu binh
kieu tinh » lieu tinh, trieu tinh, diep tinh
anh dung » anh dong, anh huong, sach dung
dao phan » dao phat, dam phan, do phan
phan cau » phan dau, phan cac, phan tu

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