Perhaps you should try some spelling variations:
luong thanh » muong thanh, truong thanh, dong thanh
hanh truong » hanh trong, anh truong, manh truong
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
truong cua » truong ca, truong quan, truong cao
dung luong » dung thuong, dung phuong, dung truong
cua dung » cua dang, cua dong, qua dung
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (chieu sang)) - hanh truong cua dung luong thanh ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chieu sang)) - hanh truong cua dung luong thanh ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (chieu sang)) - hanh truong cua dung luong thanh ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chieu sang)) - hanh truong cua dung luong thanh ((toan cau) OR (toan ban))*.