Perhaps you should try some spelling variations:
te sach » toc sach
vu dinh » quy dinh
hieu va » lieu va, hieu qua
tu nano » truc nano
tu nang » tru nang, tu nong, tu lang
co xuc » co xuoc, co xua
vi cua » vai cua, di cua
cua te » cua tu
va co » vo co

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 ((tu nang) OR (tu nano)) xa hoi. hieu va co xuc ((vu dinh) or (van minh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (tu nano)) xa hoi. hieu va co xuc ((vu dinh) OR (van minh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nang) OR (tu nano)) xa hoi. hieu va co xuc ((vu dinh) or (van minh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) OR (tu nano)) xa hoi. hieu va co xuc ((vu dinh) or (van minh)) vi cua te*.