Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tham thuc » nham thuc, pham thuc, tam thuc
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
thuc va » thuc vat, thuc dan, thuc day
va dan » ca dan, va dao, va dau
dan ki » dan ky, dan ke, dan li
ki su » ky su

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) or (thuoc sach)) ky nang xa hoi. hieu va tham thuc va dan ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuoc sach)) ky nang xa hoi. hieu va tham thuc va dan ki su triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuoc sach)) ky nang xa hoi. hieu va tham thuc va dan ki su triet*.