Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, hieu ve
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cau tuc » cau truc, cau tu, cau luc
danh de » hanh de, dan de, danh di
dang de » dang deo, dung de, dang do
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa

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: tu sach y nang xa hoi. ((hieu van) OR (lieu va)) cau tuc va ((danh de) OR (dang de)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. ((hieu van) or (lieu va)) cau tuc va ((danh de) OR (dang de)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. ((hieu van) or (lieu va)) cau tuc va ((danh de) OR (dang de)) cua triet*.