Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
va hanh » van hanh, va thanh, va danh
hanh de » hanh ve, hanh kem
sach 2 » sach y
2 nang » v nang
xuc va » duc va, tuc va, luc va
de va » de van, te va, ke va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach 2 nang xa hoi. ((hieu va) or (lieu va)) cam xuc va hanh de va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach 2 nang xa hoi. ((hieu va) OR (lieu va)) cam xuc va hanh de va triet.
• Adding a wildcard symbol may retrieve word variants: doc sach 2 nang xa hoi. ((hieu va) or (lieu va)) cam xuc va hanh de va triet*.