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
cao luc » cao duc, cao suc, cau luc
bao luc » bao thuc
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, dua tren
v nang » va nang, vu nang, van nang
sach v » sach va, sach y, sach 2

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach v nang xa hoi. lieu va ((cao luc) OR (bao luc)) va danh di ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v nang xa hoi. lieu va ((cao luc) OR (bao luc)) va danh di ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v nang xa hoi. lieu va ((cao luc) OR (bao luc)) va danh di ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: toc sach v nang xa hoi. lieu va ((cao luc) OR (bao luc)) va danh di ((cua tre) or (cua triet))*.