Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach doi » sach hoi, sach moi, sach dao
lang van » tang van, hoang van, giang van
dang van » hoang van, hang va
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
hieu va » lieu va, hieu qua
sach lo » sach dao, sach hoi, sach moi
va cau » van cau, va cac, va dau
luc va » duc va, tuc va, loc va
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) or (sach doi)) ((lang van) OR (dang van)) hoi. hieu va cau luc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach lo) OR (sach doi)) ((lang van) OR (dang van)) hoi. hieu va cau luc va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach lo) or (sach doi)) ((lang van) OR (dang van)) hoi. hieu va cau luc va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach lo) or (sach doi)) ((lang van) OR (dang van)) hoi. hieu va cau luc va hanh vai cua te*.