Perhaps you should try some spelling variations:
dau tien » van tien
lang van » dang van, tang van, hoang van
cau tren » cu tren, dau tren, ca tren
van hanh » van thanh, ban hanh, van anh
va cham » va chat, va tham
soc van » hoc van, oc van, sac van
lang xa » lang ha, dang xay
hanh va » hang va, hanh vi
tu sach » thu sach, su sach, te sach
sach o » sach lo, sac o, sach y

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 o ((lang xa) OR (lang van)) hoi. lieu va cham soc van hanh va ((cau tren) or (dau tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach o ((lang xa) OR (lang van)) hoi. lieu va cham soc van hanh va ((cau tren) OR (dau tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach o ((lang xa) OR (lang van)) hoi. lieu va cham soc van hanh va ((cau tren) or (dau tien))".
• Adding a wildcard symbol may retrieve word variants: tu sach o ((lang xa) OR (lang van)) hoi. lieu va cham soc van hanh va ((cau tren) or (dau tien))*.