Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
lo lang » o lang, so lang, hoa lang
vai cua » dai cua, hai cua, lai cua
le lang » le tang, le dang, le xang
va hanh » van hanh, va thanh, va danh
luc va » duc va, tuc va, loc va
va cam » va cham, va cao, va cai
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 lang) OR (le lang)) xa hoi. hieu ((va cam) or (va cac)) luc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((lo lang) OR (le lang)) xa hoi. hieu ((va cam) OR (va cac)) luc va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((lo lang) OR (le lang)) xa hoi. hieu ((va cam) or (va cac)) luc va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((lo lang) OR (le lang)) xa hoi. hieu ((va cam) or (va cac)) luc va hanh vai cua te*.