Perhaps you should try some spelling variations:
thien van » thi van
nhanh ha » thanh hoa, thanh hai, khanh hoa
hanh hai » thanh hai, nhanh hai, hang hai
van bac » van ban, van bao, van hac
su sach » so sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
vu sach » vu bach, vu khach
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) OR (vu sach)) ky lang xa hoi. thien van bac duc va ((hanh hai) or (nhanh ha)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky lang xa hoi. thien van bac duc va ((hanh hai) OR (nhanh ha)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky lang xa hoi. thien van bac duc va ((hanh hai) or (nhanh ha)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky lang xa hoi. thien van bac duc va ((hanh hai) or (nhanh ha)) cua tre*.