Perhaps you should try some spelling variations:
thien van » thi van
thanh lai » thanh hai, thanh lap, thanh loi
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
cua viet » ca viet, hoa viet, cua dieu
sach ty » sach y, sach tu, sach thu
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
van bac » van ban, van bao, van hac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty ((nang ma) or (tang ma)) hoi. thien van bac duc va thanh lai ((cua viet) OR (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((nang ma) OR (tang ma)) hoi. thien van bac duc va thanh lai ((cua viet) OR (cua vat))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((nang ma) or (tang ma)) hoi. thien van bac duc va thanh lai ((cua viet) OR (cua vat))*".