Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
phan cua » nhan cua, than cua, phat cua
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
va hoi » va hoc, va 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: ((thu sach) or (thuoc sach)) _ hang ((va hoi) OR (xa hoi)). hieu va pham duc va thanh phan cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) _ hang ((va hoi) OR (xa hoi)). hieu va pham duc va thanh phan cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuoc sach)) _ hang ((va hoi) OR (xa hoi)). hieu va pham duc va thanh phan cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) _ hang ((va hoi) OR (xa hoi)). hieu va pham duc va thanh phan cua te*.