Perhaps you should try some spelling variations:
danh dai » danh dau, danh di, danh sai
hoc sach » hoc sinh, hoc cac, hoc anh
thu bang » thu ban, thu hang, chu bang
ve pham » v pham, ve phan, ve phat
va danh » va dinh, va dan, va hanh
chuc va » thuc va, thuc vat
co sach » bo sach, cuon sach
bang ma » bang may, tang ma, ban ma
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((co sach) OR (hoc sach)) thu bang ma hoi. hieu ((ve pham) or (vi pham)) chuc va danh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (hoc sach)) thu bang ma hoi. hieu ((ve pham) OR (vi pham)) chuc va danh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) OR (hoc sach)) thu bang ma hoi. hieu ((ve pham) or (vi pham)) chuc va danh dai cua te".
• Adding a wildcard symbol may retrieve word variants: ((co sach) OR (hoc sach)) thu bang ma hoi. hieu ((ve pham) or (vi pham)) chuc va danh dai cua te*.