Perhaps you should try some spelling variations:
su triet » su viet, su tien
ve triet » va trien
tu bach » vu bach, tu cach, tu bac
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
van anh » van thanh, tuan anh, van minh
va cam » va cham, va cac, va cao
anh ki » anh kinh, anh kiem, anh kien

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. hieu va cam luc van anh ki ((su triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bach ((van dong) OR (van ban)) xa hoi. hieu va cam luc van anh ki ((su triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bach ((van dong) or (van ban)) xa hoi. hieu va cam luc van anh ki ((su triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: tu bach ((van dong) or (van ban)) xa hoi. hieu va cam luc van anh ki ((su triet) OR (ve triet))*.