Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (su sach)) ky nang xa hoi. ((hieu ve) or (lieu va)) cau luc va thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (su sach)) ky nang xa hoi. ((hieu ve) OR (lieu va)) cau luc va thanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (su sach)) ky nang xa hoi. ((hieu ve) or (lieu va)) cau luc va thanh di cua tre*.