Perhaps you should try some spelling variations:
nam truc » nam truoc, nam thuc, nam trung
toc sach » hoc sach, doc sach, thuoc sach
hang tai » hang va, dung tai
han tai » nhan tai, van tai, toan tai
truc va » thuc va, thuc vat, trung va
tu sach » thu sach, su sach, te sach
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
cuu tre » cua tre, cau tren, cau treo
va nam » van nam, ha nam, va nay

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) or (toc sach)) ky dang xa hoi. lieu va nam truc va ((han tai) OR (hang tai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky dang xa hoi. lieu va nam truc va ((han tai) OR (hang tai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ky dang xa hoi. lieu va nam truc va ((han tai) OR (hang tai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky dang xa hoi. lieu va nam truc va ((han tai) OR (hang tai)) cuu tre*.