Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
thi cong » tai cong, thien cong
tu sach » thu sach, su sach, te sach
duc ban » duc tan, duc van, dua ban
lam duc » lam duoc, pham duc, nam duoc
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
sach v » sach va, sach y, sach 2

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 v ((nang xa) OR (lang xa)) hoi. ((lieu va) or (thi cong)) lam duc ban thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v ((nang xa) OR (lang xa)) hoi. ((lieu va) OR (thi cong)) lam duc ban thanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v ((nang xa) OR (lang xa)) hoi. ((lieu va) or (thi cong)) lam duc ban thanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach v ((nang xa) OR (lang xa)) hoi. ((lieu va) or (thi cong)) lam duc ban thanh dai cua tre*.