Perhaps you should try some spelling variations:
cham loc » cham soc, chon loc, cham o
hieu va » lieu va, hieu qua
va cham » va chat, va tham
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
loc va » hoc va, luc va
dan va » dan ca, ban va, han va

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 y) or (sac ky)) lang xa hoi. hieu va cham loc va ((dan va) OR (doan va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sac ky)) lang xa hoi. hieu va cham loc va ((dan va) OR (doan va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach y) or (sac ky)) lang xa hoi. hieu va cham loc va ((dan va) OR (doan va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sac ky)) lang xa hoi. hieu va cham loc va ((dan va) OR (doan va)) cua tre*.