Perhaps you should try some spelling variations:
thien van » thi van
tu sach » thu sach, su sach, te sach
cau luc » cau truc, cau phuc
ty nang » ky nang, ty xang, ly nang
hanh va » hang va, hanh vi
ty hang » ly hang, ty xang, thi hang
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
va cua » va chua, via cua, ca cua
luc va » duc va, tuc va, loc va
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty nang) OR (ty hang)) x hoi. ((hieu ve) or (thien van)) cau luc va hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) x hoi. ((hieu ve) OR (thien van)) cau luc va hanh va cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty hang)) x hoi. ((hieu ve) or (thien van)) cau luc va hanh va cua te*".