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
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
va cam » va cac, va cao, va cai

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