Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach lo » sach dao, sach doi, sach hoi
cua tre » cuu tre, cua triet, dua tren
hanh va » hanh vi
va hanh » van hanh, va thanh, va danh
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
lo hang » ly hang, le hang, cho hang
loc va » hoc va, luc va
va hoi » xa hoi, va hoc, va hoa
cua te » cua tu

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