Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
bac tuc » bac tu, bac thua
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tri cua, dai cua
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach y nang xa hoi. hieu va ((bac tuc) or (bach tuoc)) va hanh ((tai cua) OR (tai cuc)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach y nang xa hoi. hieu va ((bac tuc) OR (bach tuoc)) va hanh ((tai cua) OR (tai cuc)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach y nang xa hoi. hieu va ((bac tuc) or (bach tuoc)) va hanh ((tai cua) OR (tai cuc)) triet".
• Adding a wildcard symbol may retrieve word variants: co sach y nang xa hoi. hieu va ((bac tuc) or (bach tuoc)) va hanh ((tai cua) OR (tai cuc)) triet*.