Perhaps you should try some spelling variations:
manh gianh » manh giang, manh binh, manh tinh
gianh dai » gianh lai, gian dan, giang day
cua viet » ca viet, hoa viet, cua vat
cham duc » pham duc, pham duy, phan duc
tu sach » thu sach, su sach, te sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
hieu va » lieu va, hieu qua
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 va ((cham duc) OR (cham soc)) manh gianh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) x hoi. hieu va ((cham duc) OR (cham soc)) manh gianh dai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) or (ty hang)) x hoi. hieu va ((cham duc) OR (cham soc)) manh gianh dai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty hang)) x hoi. hieu va ((cham duc) OR (cham soc)) manh gianh dai cua viet*.