Perhaps you should try some spelling variations:
thanh ca » thanh cha, thanh cac, thanh ha
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
cam tuc » cam xuc, nam thuc, dam thuc
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang
cam tu » cam thu, nam tu, dam tu
ca cua » co 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: su sach ((y nang) OR (ly nang)) x hoi. hieu van ((cam tuc) or (cam tu)) va thanh ca cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly nang)) x hoi. hieu van ((cam tuc) OR (cam tu)) va thanh ca cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ly nang)) x hoi. hieu van ((cam tuc) or (cam tu)) va thanh ca cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ly nang)) x hoi. hieu van ((cam tuc) or (cam tu)) va thanh ca cua te*.