Perhaps you should try some spelling variations:
nang ha » nang hai, nang han, nang hoa
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
te cac » ve cac, te cao, de cac
ha hoi » hoa hoi, ha noi, xa hoi
soc va » hoc va, loc va, doc va

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

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