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