Perhaps you should try some spelling variations:
thanh hoa » thanh pho
thanh loi » thanh hai, thanh lap
nhan duc » nhan duoc, nhan luc, phan duc
su sach » so sach, vu sach
va nhan » van nhan, ca nhan, va phan
hieu va » lieu va, hieu qua
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
te sach » toc sach
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: ((su sach) or (te sach)) ky dang xa hoi. hieu va nhan duc va ((thanh loi) OR (thanh hoa)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky dang xa hoi. hieu va nhan duc va ((thanh loi) OR (thanh hoa)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (te sach)) ky dang xa hoi. hieu va nhan duc va ((thanh loi) OR (thanh hoa)) cua tre*".