Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh hai » thanh phan, thanh hoa, thanh san
van pham » san pham, van phan, van phat
duc ban » duc tan, duc van, dua ban
su sach » vu sach
thi van » thi lan, thi hanh, thi nang
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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 (so sach)) y nang xa hoi. thi van pham duc ban ((thanh hai) or (thanh toan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang xa hoi. thi van pham duc ban ((thanh hai) OR (thanh toan)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) y nang xa hoi. thi van pham duc ban ((thanh hai) or (thanh toan)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) y nang xa hoi. thi van pham duc ban ((thanh hai) or (thanh toan)) cua tre*.