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
duoc ban » duc ban, quoc ban, buoc ban
nam duoc » nam thuoc, da duoc, dat duoc
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
va nang » van nang, da nang, cam nang
v nang » vu nang, van nang, voi nang

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