Perhaps you should try some spelling variations:
thanh ban » thanh san, thanh van, thanh bac
ban thanh » ban hanh, ban hang
thien van » thi van
nam duoc » nam thuoc, da duoc, dat duoc
su sach » so sach, vu sach
ban cua » ban quan
lam duc » lam duoc, pham duc, lam dung
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
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 ((ky lang) OR (ky tang)) xa hoi. thien van ((lam duc) or (nam duoc)) ban thanh ban cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky tang)) xa hoi. thien van ((lam duc) OR (nam duoc)) ban thanh ban cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) OR (ky tang)) xa hoi. thien van ((lam duc) or (nam duoc)) ban thanh ban cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) OR (ky tang)) xa hoi. thien van ((lam duc) or (nam duoc)) ban thanh ban cua tre*.