Perhaps you should try some spelling variations:
sach hoi » sach doi, sach moi, cach thoi
van hanh » van thanh, ban hanh, van anh
hanh noi » ha noi, hanh vi, nang noi
sach ly » sach y, sach lo, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua vuc » cua duc, cua tuc, cua vu
vuc van » duc van, luc van, thuc van
noi cua » hoi cua, doi cua, moi cua
va cua » va chua, via cua, ca 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: tu ((sach ly) or (sach hoi)) nang xa hoi. hieu va cua vuc van hanh noi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ly) OR (sach hoi)) nang xa hoi. hieu va cua vuc van hanh noi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ly) or (sach hoi)) nang xa hoi. hieu va cua vuc van hanh noi cua tu*.