Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nham thu » nham thuc, nam thu, pham thu
su sach » vu sach
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va nham » va cham, va tham, va nha
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
thu va » thuc va, thue va, tu va
vi cua » vai cua, di cua

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 (so sach))) or (toc sach)) ky nang xa hoi. hieu va nham thu va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((su sach) OR (so sach))) OR (toc sach)) ky nang xa hoi. hieu va nham thu va hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((su sach) OR (so sach))) or (toc sach)) ky nang xa hoi. hieu va nham thu va hanh vi cua tre*".