Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
hanh tai » thanh tai, hang tai, han tai
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
va cam » va cham, va cac, va cao
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 cam duc va hanh tai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky lang xa hoi. hieu va cam duc va hanh tai ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te sach)) ky lang xa hoi. hieu va cam duc va hanh tai ((cua triet) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te sach)) ky lang xa hoi. hieu va cam duc va hanh tai ((cua triet) or (cua viet))*.