Perhaps you should try some spelling variations:
te sach » toc sach
viet tu » viet duc, viet ngu
viet su » viet suu, viet sau, viet du
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
cao xuc » cam xuc, cao duc, cao suc
hieu va » lieu va, hieu qua
va nang » van nang, da nang, cam nang
vu nang » vuc nang, vu dang, v nang
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: te sach ((vu nang) or (va nang)) xa hoi. hieu va cao xuc van anh ((viet su) OR (viet tu)) hien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((vu nang) OR (va nang)) xa hoi. hieu va cao xuc van anh ((viet su) OR (viet tu)) hien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((vu nang) or (va nang)) xa hoi. hieu va cao xuc van anh ((viet su) OR (viet tu)) hien".
• Adding a wildcard symbol may retrieve word variants: te sach ((vu nang) or (va nang)) xa hoi. hieu va cao xuc van anh ((viet su) OR (viet tu)) hien*.