Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
danh tri » dinh tri, thanh tri, danh thin
te sach » toc sach
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
te sac » te cac, te san

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) or (te sach)) ((ky lang) OR (ky dang)) xa hoi. hieu va cham duc va danh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ((ky lang) OR (ky dang)) xa hoi. hieu va cham duc va danh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (te sach)) ((ky lang) OR (ky dang)) xa hoi. hieu va cham duc va danh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ((ky lang) OR (ky dang)) xa hoi. hieu va cham duc va danh tri cua tre*.