Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhieu tang » chieu sang, hieu lang, nhiet nang
canh trinh » canh tranh, hanh trinh, canh tinh
trinh han » trinh quan
han nhung » hanh nhung, hon nhung, ban nhung
cong cao » cong cau, cong cac, cong cho
cong co » dong co, cong cu, cong so

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (nhieu tang)) - canh trinh han nhung ((cong cao) OR (cong co)) chat va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (nhieu tang)) - canh trinh han nhung ((cong cao) OR (cong co)) chat va.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (nhieu tang)) - canh trinh han nhung ((cong cao) OR (cong co)) chat va".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (nhieu tang)) - canh trinh han nhung ((cong cao) OR (cong co)) chat va*.