Perhaps you should try some spelling variations:
thien van » thi van
dang hai » dang khai, hang hai, dung hai
dang xay » dang van, van xay
van cam » van nam, van lam, van cau
hai cua » thai cua, dai cua, hoi cua
duc van » duc va, duc tan, duc manh
xuc ban » duc ban, cuc ban, quoc ban
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((lang xa) OR (dang xay)) hoi. thien van cam ((xuc ban) or (duc van)) dang hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((lang xa) OR (dang xay)) hoi. thien van cam ((xuc ban) OR (duc van)) dang hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((lang xa) OR (dang xay)) hoi. thien van cam ((xuc ban) or (duc van)) dang hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((lang xa) OR (dang xay)) hoi. thien van cam ((xuc ban) or (duc van)) dang hai cua tre*.