Perhaps you should try some spelling variations:
van tuan » van quan, van ban, anh tuan
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tuan ve » tuan le, quan ve, luan ve
xuc van » duc van, luc van, vuc van
su tien » su kien, su hien, tu tieng
tu nang » tru nang, tu nong, tu nano
va bao » va bai
va cao » va co, va dao
x hoi » xa hoi, o hoi, x ho
ve su » va su

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

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