Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac tac » cac toc, cac dac, cac tai
cac bac » cac bai, cac ban, cac cach
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, ly nang, v nang
vi luu » vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang xa hoi. hieu ve ((cac tac) OR (cac bac)) va danh vi luu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang xa hoi. hieu ve ((cac tac) OR (cac bac)) va danh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu ve ((cac tac) OR (cac bac)) va danh vi luu tre*.