Perhaps you should try some spelling variations:
dan thai » dang thai, dan thi, dan than
thai cuu » thai cua, tai cuc, thi cuc
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
van cac » van cau, van bac, dan cac
van hac » van hoc, van ha, van hai
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. hieu ((van cac) OR (van hac)) nuoc va dan thai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ((van cac) OR (van hac)) nuoc va dan thai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((van cac) OR (van hac)) nuoc va dan thai cuu tre*.