Perhaps you should try some spelling variations:
thien van » thi van
van hanh » van thanh, ban hanh, van anh
su triet » su viet, ve triet
tu bach » vu bach, tu cach, tu bac
van cam » van nam, van lam, van cau
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
hanh ky » hanh kem
su tien » su kien, su hien, tu tieng

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu bach ((van dong) or (van ban)) xa hoi. thien van cam luc van hanh ky ((su triet) OR (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bach ((van dong) OR (van ban)) xa hoi. thien van cam luc van hanh ky ((su triet) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bach ((van dong) or (van ban)) xa hoi. thien van cam luc van hanh ky ((su triet) OR (su tien))".
• Adding a wildcard symbol may retrieve word variants: tu bach ((van dong) or (van ban)) xa hoi. thien van cam luc van hanh ky ((su triet) OR (su tien))*.