Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
cau treo » cau theo, cau triet, cau trieu
cau tren » cu tren, dau tren, ca tren
vu sach » vu bach, su sach, vu khach
vang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
y vang » ly vang
luc va » duc va, tuc va, loc va

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 hoi. hieu va cham luc va hanh vi ((cau treo) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y vang xa hoi. hieu va cham luc va hanh vi ((cau treo) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: vu sach y vang xa hoi. hieu va cham luc va hanh vi ((cau treo) OR (cau tren))*.