Perhaps you should try some spelling variations:
thien van » thi van
van chat » cao chat
ban hang » ngan hang
tan hang » tan khang, van hang, gan hang
chat duc » chat xuc, chat doc, chet duoc
vai cuu » vai cua
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
cuu tre » cua tre, cau tren, cau treo
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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) or (su sach)) ky nang o hoi. thien van chat duc ((tan hang) OR (ban hang)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang o hoi. thien van chat duc ((tan hang) OR (ban hang)) vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang o hoi. thien van chat duc ((tan hang) OR (ban hang)) vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang o hoi. thien van chat duc ((tan hang) OR (ban hang)) vai cuu tre*.