Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
vu sach » vu bach, su sach, vu khach
vang xa » lang xa, ang xa, dang xay
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, tuc va, loc va
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: vu sach y ((vang xa) OR (mang xa)) hoi. hieu va cham luc va hanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y ((vang xa) OR (mang xa)) hoi. hieu va cham luc va hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: vu sach y ((vang xa) OR (mang xa)) hoi. hieu va cham luc va hanh vi cuu tre*.