Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
cua triet » cua viet, su triet
hanh tai » thanh tai, hang tai, han tai
va triet » va thiet, va trien, ve triet
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
nang xa » nang x, lang xa, nang ma
co sach » bo sach, cuon sach, hoc sach
bac tu » ban tu, tac tu, cac tu
y nang » ky nang, ly nang, v nang

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

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