Perhaps you should try some spelling variations:
dan thai » dang thai, dan thi, dan than
thai cuu » thai cua, tai cuc, thi cuc
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van cac » van hac, van cau, van bac
van dau » van dao, phan dau
cuu tre » cua tre, cau tren, cau treo
va dan » ca dan, va dao, va dau
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ((van cac) or (van dau)) nuoc va dan thai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu ((van cac) OR (van dau)) nuoc va dan thai cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu ((van cac) or (van dau)) nuoc va dan thai cuu tre*.