Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dua tren » dung tren
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
bao luc » bao thuc
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua thep
va danh » va dinh, va dan, va hanh
va bao » va bai
luc va » duc va, tuc va, loc va
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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