Perhaps you should try some spelling variations:
cuon sach » duong sach, cuoc cach, co sach
cuon sac » cuong cac, cuong sau, cuoi cac
cap nuoc » dat nuoc
lang xa » dang xay, lang van
lang ha » long ha
hieu ve » hieu va, hieu van
va can » va chan, va cac, va cao
ve cap » ve cac, le cap, ve cai
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((cuon sac) or (cuon sach)) ky ((lang xa) OR (lang ha)) hoi. hieu ve cap nuoc va can dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((cuon sac) OR (cuon sach)) ky ((lang xa) OR (lang ha)) hoi. hieu ve cap nuoc va can dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((cuon sac) or (cuon sach)) ky ((lang xa) OR (lang ha)) hoi. hieu ve cap nuoc va can dai cua te".
• Adding a wildcard symbol may retrieve word variants: ((cuon sac) or (cuon sach)) ky ((lang xa) OR (lang ha)) hoi. hieu ve cap nuoc va can dai cua te*.