Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
hoc thuc » hoc huu
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
tai cau » tai cac, tai cao
va hanh » va thanh, va danh, ban hanh
te sach » toc sach
hac duc » hoc duc, ha duc, thach duc
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang

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: te sach y nang xa hoi. hieu van ((hac duc) OR (hoc thuc)) ((va hanh) OR (van hanh)) tai cau triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. hieu van ((hac duc) or (hoc thuc)) ((va hanh) OR (van hanh)) tai cau triet~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu van ((hac duc) or (hoc thuc)) ((va hanh) OR (van hanh)) tai cau triet*.