Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
xa hanh » xa thanh, xa khanh, va hanh
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: ((so sach) or (((toc sach) or (thuoc sach)))) ky nang xa hoi. hieu ve cham tuc xa hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (((toc sach) OR (thuoc sach)))) ky nang xa hoi. hieu ve cham tuc xa hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (((toc sach) or (thuoc sach)))) ky nang xa hoi. hieu ve cham tuc xa hanh vi cua viet*.