Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tri nang » thi nang, tra nang, tri bang
cac thoi » cac toi, cac hop, cac tro
hang doi » hang di, hang loi, huong doi
tu nang » tru nang, tu nong, tu nano
hieu va » lieu va, hieu qua
thoi va » hoi va, thai va, tho va
va hang » van hang, va nang, va lang
doi cuu » doi cua, doi cuoc
cuu tre » cua tre, cau tren, cau treo
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: toc sach ((tu nang) or (tri nang)) x hoi. hieu va cac thoi va hang doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((tu nang) OR (tri nang)) x hoi. hieu va cac thoi va hang doi cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ((tu nang) or (tri nang)) x hoi. hieu va cac thoi va hang doi cuu tre*.