Perhaps you should try some spelling variations:
thanh hoa » thanh pho
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van chat » cao chat
thuc va » thuc vat, thuc dan, thuc day
hoa cua » hoa chat, hoa xuat
te sach » toc sach
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
tuc va » truc va, tuc xa, duc va
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu sach)) y nang xa hoi. hieu van chat ((tuc va) OR (thuc va)) thanh hoa cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) y nang xa hoi. hieu van chat ((tuc va) OR (thuc va)) thanh hoa cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu sach)) y nang xa hoi. hieu van chat ((tuc va) OR (thuc va)) thanh hoa cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) y nang xa hoi. hieu van chat ((tuc va) OR (thuc va)) thanh hoa cua tre*.