Perhaps you should try some spelling variations:
hanh di » hanh vi, hanh de, hang di
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
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: vu sach y ((mang may) or (nang ma)) hoi. hieu ve cham ((xuc va) or (luc va)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y ((mang may) OR (nang ma)) hoi. hieu ve cham ((xuc va) OR (luc va)) hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach y ((mang may) or (nang ma)) hoi. hieu ve cham ((xuc va) or (luc va)) hanh di cua tre*.