Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
van cam » van nam, van lam, van cau
sach ky » sac ky, sach y, sach kem
sang xa » song xa, lang xa, sang ma
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, luc va

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