Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
dong cong » duong cong, dung cong, dang cong
tinh pho » tinh phu, tich pho, tinh cho
pho dong » pho uong, pho thong, phan dong
cham van » pham van, cham va, chao van
cong co » dong co, cong cu, cong so
co cham » ca cham, co champa, cao chat

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 (hieu lang)) - hanh tinh pho dong cong co cham van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (hieu lang)) - hanh tinh pho dong cong co cham van.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (hieu lang)) - hanh tinh pho dong cong co cham van*.