Perhaps you should try some spelling variations:
thien van » thi van
vat hanh » vat thanh, van hanh, va hanh
thuy vat » thuc vat, thuy van, thuat vat
hanh va » hang va, hanh vi
ha thuy » thi thuy, thu thuy
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
van ha » van hoa, van chat, van hanh
su cac » tu cac, su cao, su can
va cua » va chua, via cua, ca cua
su sac » su sach, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) OR (su cac)) ky ((nang x) or (tang ma)) hoi. thien van ha thuy vat hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su cac)) ky ((nang x) OR (tang ma)) hoi. thien van ha thuy vat hanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su cac)) ky ((nang x) or (tang ma)) hoi. thien van ha thuy vat hanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su cac)) ky ((nang x) or (tang ma)) hoi. thien van ha thuy vat hanh va cua tre*.