Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van dinh » van minh, van dich, va dinh
cao xuc » cam xuc, cao duc, cao suc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
va cao » va cac, va co, va dao
vi cua » vai cua, di cua
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: ((te sach) OR (toc sach)) tu nang xa hoi. hieu va cao xuc ((quy dinh) or (van dinh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) tu nang xa hoi. hieu va cao xuc ((quy dinh) OR (van dinh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) tu nang xa hoi. hieu va cao xuc ((quy dinh) or (van dinh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) tu nang xa hoi. hieu va cao xuc ((quy dinh) or (van dinh)) vi cua te*.