Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
hoc sach » hoc sinh, hoc cac, hoc anh
toc sach » doc sach, nuoc sach, toc san
cham tuc » nham thuc, pham thuc, tham thuc
cua viet » ca viet, hoa viet, cua vat
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
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (((toc sach) or (thuoc sach)))) ky nang xa hoi. hieu ve cham tuc xa hanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (((toc sach) OR (thuoc sach)))) ky nang xa hoi. hieu ve cham tuc xa hanh di cua viet.
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (((toc sach) or (thuoc sach)))) ky nang xa hoi. hieu ve cham tuc xa hanh di cua viet*.