Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh hai » thanh phan, thanh hoa, thanh san
thi nang » thi cong, ki nang, thi hanh
su sach » so sach, vu sach
lam duc » lam duoc, pham duc, nam duoc
duc ban » duc tan, duc van, dua ban
thi van » thi lan, thi hanh
nang xa » nang x, lang xa, nang ma
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 y nang xa hoi. ((thi van) OR (thi nang)) lam duc ban ((thanh hai) or (thanh toan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. ((thi van) OR (thi nang)) lam duc ban ((thanh hai) OR (thanh toan)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. ((thi van) OR (thi nang)) lam duc ban ((thanh hai) or (thanh toan)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. ((thi van) OR (thi nang)) lam duc ban ((thanh hai) or (thanh toan)) cua tre*.