Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van anh
thai cua » than cua, tai cuc, tri cua
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » va thanh, va danh, ban hanh
cua tre » cua te, cuu tre, cua triet
tai ky » thai ky, trai ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te tai ky lang ha hoi. hieu va cham duc ((va hanh) OR (van hanh)) thai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te tai ky lang ha hoi. hieu va cham duc ((va hanh) OR (van hanh)) thai cua tre".
• Adding a wildcard symbol may retrieve word variants: te tai ky lang ha hoi. hieu va cham duc ((va hanh) OR (van hanh)) thai cua tre*.