Perhaps you should try some spelling variations:
can thanh » ban thanh, van thanh, cac thanh
cua viet » ca viet, hoa viet, cua vat
luoc can » luc canh, hoc can, luoc dai
cac luoc » cac nuoc, cac cuoc, cac quoc
san cua » sang cua, ban cua, dan cua
hieu va » lieu va, hieu qua
su sach » so sach, vu sach
ty hang » ty xang, thi hang, thu hang
ty nang » ky nang, ty xang, ly nang
ly hang » ly quang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty nang) or (((ty hang) OR (ly hang)))) xa hoi. hieu va cac luoc can thanh san cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (((ty hang) OR (ly hang)))) xa hoi. hieu va cac luoc can thanh san cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) or (((ty hang) OR (ly hang)))) xa hoi. hieu va cac luoc can thanh san cua viet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (((ty hang) OR (ly hang)))) xa hoi. hieu va cac luoc can thanh san cua viet*.