Perhaps you should try some spelling variations:
van danh » van doanh, van anh, van hanh
vu sach » vu bach, su sach, vu khach
danh du » danh dau, danh tu, dinh du
vang xa » lang xa, ang xa, dang xay
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach ty
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
va cam » va cham, va cac, va cao
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: vu sach ly ((vang xa) or (mang xa)) hoi. hieu va cam tuc van danh du ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly ((vang xa) OR (mang xa)) hoi. hieu va cam tuc van danh du ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ly ((vang xa) or (mang xa)) hoi. hieu va cam tuc van danh du ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: vu sach ly ((vang xa) or (mang xa)) hoi. hieu va cam tuc van danh du ((cua te) OR (cua tu))*.