Perhaps you should try some spelling variations:
te sach » toc sach
hanh ve » hanh vi, hanh va, hanh kem
duc ban » duc tan, duc van, dua ban
luc ban » cuc ban, luc bat, luc van
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ve cua » le cua, de cua, te cua

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 ky nang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc ban) or (duc ban)) hanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc ban) OR (duc ban)) hanh ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc ban) or (duc ban)) hanh ve cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc ban) or (duc ban)) hanh ve cua tre*.