Perhaps you should try some spelling variations:
sach hoi » sach doi, sach moi, cach thoi
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ly) or (sach hoi)) nang xa hoi. hieu va cam ((xuc va) or (luc va)) hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ly) OR (sach hoi)) nang xa hoi. hieu va cam ((xuc va) OR (luc va)) hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ly) or (sach hoi)) nang xa hoi. hieu va cam ((xuc va) or (luc va)) hanh vi cua tu*.