Perhaps you should try some spelling variations:
nuoc san » nuoc luan, nguoi san, nuoc quan
lang van » dang van, tang van, hoang van
nuoc van » nuoc va, luoc van, nuoc dan
cua tre » cua te, cuu tre, cua triet
ky lang » ky nang, ky dang, ky tang
van hoi » van hoa, van hoc, van hoe
hieu va » lieu va
vi cua » vai cua, di cua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang van hoi. ((hieu va) or (hieu qua)) thay ((nuoc van) OR (nuoc san)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang van hoi. ((hieu va) OR (hieu qua)) thay ((nuoc van) OR (nuoc san)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang van hoi. ((hieu va) or (hieu qua)) thay ((nuoc van) OR (nuoc san)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang van hoi. ((hieu va) or (hieu qua)) thay ((nuoc van) OR (nuoc san)) hanh vi cua tre*.