Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nam duoc » nam thuoc, da duoc, nam moc
dat duoc » dat nuoc, da duoc, luat duoc
ma hanh » va hanh, da hanh, na hanh
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
cua te » cua tu
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 ((nam duoc) or (dat duoc)) ma hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu van ((nam duoc) OR (dat duoc)) ma hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu van ((nam duoc) or (dat duoc)) ma hanh vi cua te*.