Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
qua cham » qua hai, qua cac, va cham
cham sac » cham soc, pham sach, cap sac
van hanh » van thanh, ban hanh, van anh
ty nang » ky nang, ty hang, ly nang
sac van » cac van, san van, sat van
cuu tre » cua tre, cau tren, cau treo

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