Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh via » hanh vi, hanh va, anh va
so sach » so sanh, bo sach, co sach
ty nang » ty xang, ty hang, ty nong
ly nang » ly hang, ly vang, ly quang
nam suc » nam suu, nam soc, nam sach
via cua » gia cua, gian cua, giau cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((((ty nang) OR (ly nang))) or (ky nang)) xa hoi. hieu van nam suc manh hanh via cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((((ty nang) OR (ly nang))) OR (ky nang)) xa hoi. hieu van nam suc manh hanh via cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((((ty nang) OR (ly nang))) or (ky nang)) xa hoi. hieu van nam suc manh hanh via cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach ((((ty nang) OR (ly nang))) or (ky nang)) xa hoi. hieu van nam suc manh hanh via cua triet*.