Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
uu lang » cu lang, xu lang, cuu long
tu lang » cu lang, tu lanh, xu lang
hieu va » lieu va, hieu qua
cao xuc » cam xuc, cao duc, cao suc
va cao » va cac, va co, va dao
kien » bien, vien, tien

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((uu lang) or (tu lang)) xa hoi. hieu va cao xuc ((van hanh) OR (ban hanh)) va su kien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((uu lang) OR (tu lang)) xa hoi. hieu va cao xuc ((van hanh) OR (ban hanh)) va su kien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((uu lang) or (tu lang)) xa hoi. hieu va cao xuc ((van hanh) OR (ban hanh)) va su kien".
• Adding a wildcard symbol may retrieve word variants: thu sach ((uu lang) or (tu lang)) xa hoi. hieu va cao xuc ((van hanh) OR (ban hanh)) va su kien*.