Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vi » hanh vi, thanh va, nhanh vi
thanh ve » hanh ve, thanh va, thanh vien
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
su sach » so sach, vu sach
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. hieu ve cac luc va ((thanh vi) OR (thanh ve)) ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ve cac luc va ((thanh vi) OR (thanh ve)) ((cuu tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ve cac luc va ((thanh vi) OR (thanh ve)) ((cuu tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ve cac luc va ((thanh vi) OR (thanh ve)) ((cuu tre) or (cua triet))*.