Perhaps you should try some spelling variations:
thanh duc » thach duc, than duc, thinh duc
van thanh » ban thanh, van tuan
vuc nang » cuc nang, chuc nang, van nang
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
vu nang » va nang, vu dang, v nang
cao hoi » cau hoi, co hoi, cao hoc
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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 ((vu nang) OR (vuc nang)) cao hoi. hieu van thanh duc va hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((vu nang) OR (vuc nang)) cao hoi. hieu van thanh duc va hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((vu nang) OR (vuc nang)) cao hoi. hieu van thanh duc va hanh di cua tre*.