Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
thi nang » thi cong, ki nang, thi hanh
cham tuc » nham thuc, pham thuc, tham thuc
dich lam » dinh lam, dich tam, dich kham
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
tuc van » thuc van, truc van, tuc va
lam cua » nam cua, lam chat
cua tre » cua te, cuu tre, cua triet

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 ky nang xa hoi. ((thien van) or (thi nang)) cham tuc van dich lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. ((thien van) OR (thi nang)) cham tuc van dich lam cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. ((thien van) or (thi nang)) cham tuc van dich lam cua tre*.