Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
cham duc » pham duc, pham duy, phan duc
van phan » van phong, van thanh, luan phan
phan lap » phan dau
nam viet » pham viet, lam viec, bac viet
lap nam » dap nam, lai nam, loai nam
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: thu sach y nang x hoi. hieu van ((cham duc) OR (cham soc)) van phan lap nam viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu van ((cham duc) OR (cham soc)) van phan lap nam viet".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu van ((cham duc) OR (cham soc)) van phan lap nam viet*.