Perhaps you should try some spelling variations:
hoat huyen » hoa huyen, dat huyen, hoi huyen
quy trinh » qua trinh, quy dinh
khoi phau » khoa phau, khoai chau, hoi phan
tren hoat » trien hoat, trong hoat, thien hoat
kien phuc » kien thuc, bien phuc, thien phuc
sach tren » sach tien, sach tranh
cung quy » cong quy, dung quy, nhung quy
khai pha » kham pha, khai thac
phuc cac » phuc cam, phuc ca, phuc cham
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 hoat huyen đe ky thuat: kien phuc cac ((khoi phau) OR (khai pha)) cung quy trinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tren hoat huyen đe ky thuat: kien phuc cac ((khoi phau) OR (khai pha)) cung quy trinh".
• Adding a wildcard symbol may retrieve word variants: tu sach tren hoat huyen đe ky thuat: kien phuc cac ((khoi phau) OR (khai pha)) cung quy trinh*.