Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thien van » thi van
tham thuc » nham thuc, tam thuc, thai thuc
pham thuc » phap thuc, pham chuc, nham thuc
dinh day » dinh dat, dinh dao, dinh da
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va dinh » van dinh, va kinh, va tinh
day cua » dai cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang xa hoi. thien van ((tham thuc) or (pham thuc)) va dinh day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang xa hoi. thien van ((tham thuc) OR (pham thuc)) va dinh day cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang xa hoi. thien van ((tham thuc) or (pham thuc)) va dinh day cua tre*.