Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hoc chuyen » khong chuyen
sach sinh » sach kinh, sach danh, sach song
kien hoc » khien hoc, dien hoc, kien thuc
kien hoa » dien hoa, tien hoa, kien ha
nha phan » nha phat, phap phan, nghe phan
phan ung » phan xuong, phan cong
hay tinh » may tinh, ha tinh, huy tinh
ung hay » cung hay, huong hay, dung hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach sinh hoc chuyen đe ky thuat: ((kien hoc) or (kien hoa)) sach nha phan ung hay tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach sinh hoc chuyen đe ky thuat: ((kien hoc) OR (kien hoa)) sach nha phan ung hay tinh.
• Adding a wildcard symbol may retrieve word variants: thuat sach sinh hoc chuyen đe ky thuat: ((kien hoc) or (kien hoa)) sach nha phan ung hay tinh*.