Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sang tai » hang tai, sang tao, tang tai
nang tri » nang tai, lang tri, nang thi
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
van hac » van hoc, van hai, van chat
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
van ha » van hoa, van chat, van hanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang xa hoi. thien ((van hac) or (van ha)) nuoc va ((nang tri) or (sang tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. thien ((van hac) OR (van ha)) nuoc va ((nang tri) OR (sang tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. thien ((van hac) or (van ha)) nuoc va ((nang tri) or (sang tai)) cua tre*.