Perhaps you should try some spelling variations:
truc van » truc va, thuc van, truc ban
sach thu » sach thue, sach thieu, sach tham
dao truc » dao tuc, dao tru, dai truc
sach ty » sach y, sach tu, xach tay
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
xang xa » lang xa, mang xa, ang xa
anh va » hanh va
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach ty) OR (sach thu)) xang xa hoi. hieu va dao truc van ((anh va) or (hanh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ty) OR (sach thu)) xang xa hoi. hieu va dao truc van ((anh va) OR (hanh vi)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ty) OR (sach thu)) xang xa hoi. hieu va dao truc van ((anh va) or (hanh vi)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuat ((sach ty) OR (sach thu)) xang xa hoi. hieu va dao truc van ((anh va) or (hanh vi)) cuu tre*.