Perhaps you should try some spelling variations:
thanh tri » thanh tra, thanh tai, chinh tri
va thanh » gia thanh, ban thanh, va tinh
chat tuc » chat xuc, luat tuc, chat huu
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang ma) or (nang x)) hoi. ((hieu va) or (hieu qua)) chat tuc va thanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang ma) OR (nang x)) hoi. ((hieu va) OR (hieu qua)) chat tuc va thanh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang ma) or (nang x)) hoi. ((hieu va) or (hieu qua)) chat tuc va thanh tri cua tre*.