Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
thanh tai » thanh hai, thanh toan, doanh tai
thanh tri » thanh tra, chinh tri, thanh hai
tu sach » thu sach, su sach, te sach
truc va » thuc va, thuc vat, trung va
va chat » van chat, va phat, cao chat
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet

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 xa) or (nang x)) hoi. hieu va chat truc va ((thanh tri) OR (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang x)) hoi. hieu va chat truc va ((thanh tri) OR (thanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (nang x)) hoi. hieu va chat truc va ((thanh tri) OR (thanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (nang x)) hoi. hieu va chat truc va ((thanh tri) OR (thanh tai)) cua tre*.