Perhaps you should try some spelling variations:
pham sach » pham anh, nam sach, pham hanh
cua triet » cua viet, su triet, va triet
sach van » sach han, sach va, bach van
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
ty lang » tay lang, tu lang, tai lang
ty hang » ly hang, thi hang, thu hang
hieu su » hieu sau, tieu su, hieu so
su pham » san pham
vi cua » vai cua, di cua

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 ((ty lang) or (((ty hang) OR (ty xang)))) xa hoi. hieu su pham sach van hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty lang) OR (((ty hang) OR (ty xang)))) xa hoi. hieu su pham sach van hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty lang) or (((ty hang) OR (ty xang)))) xa hoi. hieu su pham sach van hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty lang) or (((ty hang) OR (ty xang)))) xa hoi. hieu su pham sach van hanh vi cua triet*.