Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, nhieu tang
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
hieu lang » hieu quang, nhieu tang, hieu van
dung cong » dung trong
cong lang » cong vang, cong luong, cong quang
lang toan » dang toan, lang thang, lang thanh
tinh cua » trinh cua, sinh cua, tinh chat
cua dung » cua dang, cua dong, qua dung
toan cao » toan ban, toan tap

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

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