Perhaps you should try some spelling variations:
su triet » su viet, su tien
hanh lai » hanh lam, hanh tai, thanh lap
ve triet » va trien
nang cau » nang cao, hang cau, nang dau
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang
soc va » hoc va, loc va, doc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang cau hoi. thien ((van chat) or (cao chat)) soc va hanh lai ((ve triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang cau hoi. thien ((van chat) OR (cao chat)) soc va hanh lai ((ve triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang cau hoi. thien ((van chat) or (cao chat)) soc va hanh lai ((ve triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang cau hoi. thien ((van chat) or (cao chat)) soc va hanh lai ((ve triet) OR (su triet))*.