Perhaps you should try some spelling variations:
sach van » sach han, sach va, bach van
hieu van » hieu va, thien van, lieu va
van nhan » van phan, van thanh, danh nhan
nhan luc » nang luc
va thanh » gia thanh, ban thanh, va tinh
thai cua » than cua, tri cua, dai cua
tu sach » thu sach, su sach, te sach
dong xa » dong xay, duong xa, dong ha
vai cua » dai cua, hai cua, lai cua
luc va » duc va, tuc va, loc 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 van dong xa hoi. hieu van nhan luc va thanh ((vai cua) or (((thai cua) OR (tai cuc)))) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach van dong xa hoi. hieu van nhan luc va thanh ((vai cua) OR (((thai cua) OR (tai cuc)))) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach van dong xa hoi. hieu van nhan luc va thanh ((vai cua) or (((thai cua) OR (tai cuc)))) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach van dong xa hoi. hieu van nhan luc va thanh ((vai cua) or (((thai cua) OR (tai cuc)))) tre*.