Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cac dau » cac dan, cac du, cac dai
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac, vien cac
dau va » dau ve, lau va
va dao » ca dao
dao vi » dao voi, dao ve, dao va
vi cuu » vi luu, vinh cuu
o hai » co hai, so hai, _ hai
o lai » o lao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((o hai) OR (o lai)). hieu ve cac dau va dao vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((o hai) OR (o lai)). hieu ve cac dau va dao vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((o hai) OR (o lai)). hieu ve cac dau va dao vi cuu tre*.