Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
danh dai » danh dau, danh di, danh sai
su sach » so sach, vu sach
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

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (su sach)) ky nang xa hoi. hieu va chat ((truc va) or (thuc vat)) danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky nang xa hoi. hieu va chat ((truc va) OR (thuc vat)) danh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky nang xa hoi. hieu va chat ((truc va) or (thuc vat)) danh dai cua tre*.