Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
vu sach » vu bach, su sach, vu khach
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
ang xa » lang xa, dang xay, hoang xa
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 ((ang xa) or (mang xa)) hoi. hieu va cham luc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y ((ang 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 ((ang xa) or (mang xa)) hoi. hieu va cham luc va hanh vi cuu tre*.