Perhaps you should try some spelling variations:
duong sach » duong manh
cuon sach » cuoc cach, co sach, nuoc sach
cap nuoc » dat nuoc
dan dai » dat dai, can dai, dan da
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
dan dat » dung dat, dong dat, dinh dat
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 sach) or (duong sach)) ky nang xa hoi. hieu ve cap nuoc va ((dan dai) OR (dan dat)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((cuon sach) OR (duong sach)) ky nang xa hoi. hieu ve cap nuoc va ((dan dai) OR (dan dat)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((cuon sach) or (duong sach)) ky nang xa hoi. hieu ve cap nuoc va ((dan dai) OR (dan dat)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((cuon sach) or (duong sach)) ky nang xa hoi. hieu ve cap nuoc va ((dan dai) OR (dan dat)) cua te*.