Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh van » thanh van, khanh van, hanh san
cham tuc » nham thuc, pham thuc, tham thuc
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
lo nang » ho nang, ly nang, loai nang
cuu tre » cua tre, cau tren, cau treo
tuc va » thuc va, truc va, tuc xa

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)) lo nang xa hoi. hieu ve cham tuc va ((hanh van) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) lo nang xa hoi. hieu ve cham tuc va ((hanh van) OR (hanh va)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) lo nang xa hoi. hieu ve cham tuc va ((hanh van) or (hanh va)) cuu tre*.