Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
xuc manh » duc manh, duc minh, bui manh
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu nang xa hoi. ((hieu ve) or (hieu van)) cam ((xuc manh) OR (suc manh)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang xa hoi. ((hieu ve) OR (hieu van)) cam ((xuc manh) OR (suc manh)) hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nang xa hoi. ((hieu ve) or (hieu van)) cam ((xuc manh) OR (suc manh)) hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang xa hoi. ((hieu ve) or (hieu van)) cam ((xuc manh) OR (suc manh)) hanh vi cuu tre*.