Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang ho » nang hoc, nang co, tang ho
va chat » van chat, va phat, cao chat
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ro, nang x
uoc va » nuoc va, duoc va, quoc va
loc va » hoc va, luc va
de cua » le cua, te cua, dieu cua

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 y ((nang o) OR (nang ho)) hoi. lieu va chat ((uoc va) or (loc va)) hanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang o) OR (nang ho)) hoi. lieu va chat ((uoc va) OR (loc va)) hanh de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((nang o) OR (nang ho)) hoi. lieu va chat ((uoc va) or (loc va)) hanh de cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang o) OR (nang ho)) hoi. lieu va chat ((uoc va) or (loc va)) hanh de cua tre*.