Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
loai nam » hai nam
van phan » van phong, van thanh, luan phan
cham duc » pham duc, cham soc, pham duy
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
ty hang » ly hang, ty xang, thi hang
duc van » duc va, duc tan, duc manh
lap nam » dap nam, lai nam
ty nang » ky nang, ty xang, ly 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 ((ty nang) or (ty hang)) x hoi. hieu van cham duc van phan ((lap nam) OR (loai nam)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty hang)) x hoi. hieu van cham duc van phan ((lap nam) OR (loai nam)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) or (ty hang)) x hoi. hieu van cham duc van phan ((lap nam) OR (loai nam)) viet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) or (ty hang)) x hoi. hieu van cham duc van phan ((lap nam) OR (loai nam)) viet*.