Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
qua cham » qua hai, qua cac, va cham
qua cam » qua cac, qua ca, qua cai
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
tuc van » thuc van, truc van, tuc va
ty nang » ky nang, ty xang, ty hang
hang di » hang doi, hang vi, hang dien

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. hieu ((qua cam) OR (qua cham)) tuc van ((hang di) OR (hanh vi)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang xa hoi. hieu ((qua cam) OR (qua cham)) tuc van ((hang di) or (hanh vi)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. hieu ((qua cam) OR (qua cham)) tuc van ((hang di) or (hanh vi)) cua triet*.