Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cua triet, dua tren
hanh va » hang va, hanh vi
su sach » so sach, vu sach
xuc van » duc van, luc van, xuc ban
cau xuc » cam xuc, cau luc, cau truc
van cau » van dau, van hau, van chat
xang ma » tang ma, nang ma, sang ma
cuu tre » cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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 ty xang ma hoi. hieu van cau xuc van ((hanh tai) or (hanh va)) ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang ma hoi. hieu van cau xuc van ((hanh tai) OR (hanh va)) ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty xang ma hoi. hieu van cau xuc van ((hanh tai) or (hanh va)) ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach ty xang ma hoi. hieu van cau xuc van ((hanh tai) or (hanh va)) ((cua tre) OR (cuu tre))*.