Perhaps you should try some spelling variations:
kien nuoc » bien nuoc, gieng nuoc, bien duoc
sach tren » sach tien, sach tranh
khoa phau » hoa phan, khoa kham, khoa than
tren thi » trien thi, tran thi, trieu thi
nuoc anh » ngoc anh, nuoc sach, duc anh
anh khoa » doanh khoa, hang khoa
cuong va » luong va, cong va, cuong ma
duong va » duong van, dung va, luong va
tu sach » thu sach, su sach, te sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tren thi yen đe ky thuat: kien nuoc anh khoa phau ((cuong va) or (duong va)) dinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tren thi yen đe ky thuat: kien nuoc anh khoa phau ((cuong va) OR (duong va)) dinh.
• Adding a wildcard symbol may retrieve word variants: tu sach tren thi yen đe ky thuat: kien nuoc anh khoa phau ((cuong va) or (duong va)) dinh*.