Perhaps you should try some spelling variations:
phuong luong » thuong luong, phuong duong, phuong dung
chat phuong » chat phong, chat huong, chat luong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
luong van » luong va, duong van, luong vat
than tap » toan tap, han tap, than cap
phan tap » phan lap, han tap, pha tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - hanh tinh chat phuong luong van ((than tap) OR (phan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sach)) - hanh tinh chat phuong luong van ((than tap) or (phan tap))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sach)) - hanh tinh chat phuong luong van ((than tap) or (phan tap))*.