Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
hieu he » hieu ve, hiem he, hieu le
dan dai » dat dai, can dai, dan dat
he nam » ha nam, nghe nam
xe dan » ke dan, le dan, he dan

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky nang xa hoi. hieu he nam thu xe dan dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky nang xa hoi. hieu he nam thu xe dan dai cua triet*.