Perhaps you should try some spelling variations:
nuoc sac » nuoc sach, nuoc san, nuoc gac
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
chuc va » thuc va
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ve cau » ke cau, va cau, ve cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sac ky lang xa hoi. hieu ve cau ((thuc vat) or (chuc va)) ((hanh di) or (hanh de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sac ky lang xa hoi. hieu ve cau ((thuc vat) OR (chuc va)) ((hanh di) OR (hanh de)) cua tre.
• Adding a wildcard symbol may retrieve word variants: nuoc sac ky lang xa hoi. hieu ve cau ((thuc vat) or (chuc va)) ((hanh di) or (hanh de)) cua tre*.