Perhaps you should try some spelling variations:
cua triet » su triet, va triet
bach tuoc » sach duoc, sach nuoc
thien van » thi van
cua viet » ca viet, hoa viet, cua vat
van bach » van bac, van hach, van sach
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
tuoc va » thuoc va, nuoc va, duoc va
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
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: ((su sach) or (so sanh)) v nang xa hoi. thien van bach tuoc va hanh di ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) v nang xa hoi. thien van bach tuoc va hanh di ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) v nang xa hoi. thien van bach tuoc va hanh di ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) v nang xa hoi. thien van bach tuoc va hanh di ((cua triet) OR (cua viet))*.