Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sang tai » hang tai, sang tao, tang tai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
vai cuu » vai cua
van cam » van nam, van lam, van cau
sang ma » tang ma, nang ma, sang tao
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc 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 y ((sang ma) or (sang tai)) hoi. hieu van cam ((xuc va) or (luc va)) hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((sang ma) OR (sang tai)) hoi. hieu van cam ((xuc va) OR (luc va)) hanh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((sang ma) or (sang tai)) hoi. hieu van cam ((xuc va) or (luc va)) hanh vai cuu tre*.