Perhaps you should try some spelling variations:
cong luong » cong thuong, nang luong, cong dong
hieu tinh » chieu tinh, lieu tinh, hieu binh
kieu tinh » lieu tinh, trieu tinh, diep tinh
luan cong » luat cong, luong cong, luan chung
luong dao » duong dao, truong dao, luong giao
toan cau » toan cao, toan ban, toan tap
than cap » khan cap, thanh lap, thanh cac

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)) - sach dung luan cong luong dao ((toan cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu tinh) OR (kieu tinh)) - sach dung luan cong luong dao ((toan cau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: doc ((hieu tinh) or (kieu tinh)) - sach dung luan cong luong dao ((toan cau) or (than cap))*.