Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh oai
thanh dat » thanh san, thanh hai, thanh van
su sach » so sach, vu sach
ve chat » va chat, van chat
sach ty » sach y, sach tu, sach thu
ve cham » va cham, vu cham, ve chim
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va

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 ty nang xa hoi. hieu ((ve cham) OR (ve chat)) luc va ((thanh dai) or (thanh dat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((ve cham) OR (ve chat)) luc va ((thanh dai) OR (thanh dat)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ((ve cham) OR (ve chat)) luc va ((thanh dai) or (thanh dat)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ((ve cham) OR (ve chat)) luc va ((thanh dai) or (thanh dat)) cua tre*.