Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tay lang » tai lang, tay tang, tay quang
tu sach » thu sach, su sach, te sach
hanh di » hanh vi, hanh de, hang di
van cau » van dau, van hau, van chat
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
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: tu sach ((tay lang) or (ky dang)) xa hoi. hieu van cau ((luc va) or (tuc va)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tay lang) OR (ky dang)) xa hoi. hieu van cau ((luc va) OR (tuc va)) hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((tay lang) or (ky dang)) xa hoi. hieu van cau ((luc va) or (tuc va)) hanh di cua tre*.