Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
van bao » van ban, van dao
bao luc » bao thuc
luc tan » luc tai, duc tan, luc tam
vai cua » hai cua, bai cua, mai cua
lai cua » hai cua, lai chau, thai cua
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu van bao luc tan thanh ((((vai cua) OR (dai cua))) or (lai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu van bao luc tan thanh ((((vai cua) OR (dai cua))) OR (lai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu van bao luc tan thanh ((((vai cua) OR (dai cua))) or (lai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu van bao luc tan thanh ((((vai cua) OR (dai cua))) or (lai cua)) triet*.