Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cham duc » cham soc, pham duy, phan duc
nang hoi » nang noi, nang hoc, nang ho
va triet » va thiet, va trien, ve triet
ly nang » ky nang, ly hang, ly vang
va nang » van nang, da nang, cam nang
y nang » ky nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((y nang) or (ly nang)) ma hoi. lieu va ((cham duc) OR (pham duc)) va nang hoi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y nang) OR (ly nang)) ma hoi. lieu va ((cham duc) OR (pham duc)) va nang hoi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y nang) or (ly nang)) ma hoi. lieu va ((cham duc) OR (pham duc)) va nang hoi va triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y nang) or (ly nang)) ma hoi. lieu va ((cham duc) OR (pham duc)) va nang hoi va triet*.