Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
hanh via » hanh vi, hanh va, anh va
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
via cua » gia cua, gian cua, giau cua
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, 5 hoi

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

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