Perhaps you should try some spelling variations:
thu nang » thi nang, thu bang, tho nang
hanh dai » hanh tai, hanh dao, vanh dai
thu hang » thi hang, thuc hanh, thu huong
va hanh » van hanh, va thanh, va danh
chuc va » thuc va, thuc vat
so sach » so sanh, bo sach, co sach
ve pham » v pham, ve phan, ve phat
mai hoi » mai khoi, dai hoi, lai hoi
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: so sach ((thu nang) OR (thu hang)) mai hoi. hieu ((ve pham) or (vi pham)) chuc va hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((thu nang) OR (thu hang)) mai hoi. hieu ((ve pham) OR (vi pham)) chuc va hanh dai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((thu nang) OR (thu hang)) mai hoi. hieu ((ve pham) or (vi pham)) chuc va hanh dai cua te*".