Perhaps you should try some spelling variations:
nuoc sac » nuoc sach, nuoc san, nuoc gac
thuc van » thuc vat, thuc dan, thuc va
phuc van » phuc va, chuc van, khuc van
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
ve cau » ke cau, va cau, le cau
di cua » dai cua, doi cua, de cua
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. hieu ((ve cau) OR (ve cac)) ((phuc van) or (thuc van)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sac ky nang x hoi. hieu ((ve cau) OR (ve cac)) ((phuc van) OR (thuc van)) hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sac ky nang x hoi. hieu ((ve cau) OR (ve cac)) ((phuc van) or (thuc van)) hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: nuoc sac ky nang x hoi. hieu ((ve cau) OR (ve cac)) ((phuc van) or (thuc van)) hanh di cua tre*.