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