Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham luc » nhan luc, cham cuu, chat lua
vai cua » dai cua, hai cua, lai cua
dan vai » dan va, dan tai, dan vat
le lang » le tang, le dang, le xang
lo lang » o lang, so lang, hoa lang
va dan » ca dan, va dao, va dau
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((lo lang) or (le lang)) xa hoi. lieu va ((cham luc) OR (cham soc)) va dan vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((lo lang) OR (le lang)) xa hoi. lieu va ((cham luc) OR (cham soc)) va dan vai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((lo lang) or (le lang)) xa hoi. lieu va ((cham luc) OR (cham soc)) va dan vai cua tu".
• Adding a wildcard symbol may retrieve word variants: thu sach ((lo lang) or (le lang)) xa hoi. lieu va ((cham luc) OR (cham soc)) va dan vai cua tu*.