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

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