Perhaps you should try some spelling variations:
thanh tri » thanh tra, thanh tai, chinh tri
sach thu » sach thue, sach thieu, sach tham
va cham » va chat, va tham
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, xach tay
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
loc va » hoc va, luc va

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

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