Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
danh cau » danh dau, danh ca, danh hau
hieu van » hieu va, thien van, lieu va
cam truc » cau truc, nam truc, lam truoc
tu cach » tu cac
truc va » thuc va, thuc vat, trung va
cau cua » cau qua, ca cua, cu cua
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
va danh » va dinh, va dan, va hanh
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (toc sach)) ky nang xa hoi. ((hieu ve) or (hieu van)) cam truc va danh cau cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (toc sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cam truc va danh cau cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (toc sach)) ky nang xa hoi. ((hieu ve) or (hieu van)) cam truc va danh cau cua te*.