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