Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
danh dai » danh dau, danh di, danh sai
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
truc va » thuc va, trung va
cua tre » cua te, cuu tre, cua triet
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: ((tu sach) OR (thu sach)) y nang xa hoi. hieu va chat ((truc va) OR (thuc vat)) danh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y nang xa hoi. hieu va chat ((truc va) or (thuc vat)) danh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) y nang xa hoi. hieu va chat ((truc va) or (thuc vat)) danh dai cua tre*.