Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
thanh ve » hanh ve, thanh va, thanh vien
hieu va » lieu va, hieu qua
luc ban » duc ban, cuc ban, luc bat
cuu ban » cuu van, cua ban, cuu san
ty nang » ky nang, ty hang, ly nang
va cam » va cham, va cac, va cao
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ((ty nang) or (ty xang)) xa hoi. hieu va cam ((luc ban) or (cuu ban)) thanh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((ty nang) OR (ty xang)) xa hoi. hieu va cam ((luc ban) OR (cuu ban)) thanh ve cua triet.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((ty nang) or (ty xang)) xa hoi. hieu va cam ((luc ban) or (cuu ban)) thanh ve cua triet*.