Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
tinh khang » tinh khong, trinh khung, tinh quang
dinh huong » dinh duong, anh huong
phan khoa » pham khoa, nhan khoa, phan hoa
khoa phan » hoa phan, khoa than, khoa phau
phan cong » thanh cong
kien hoc » khien hoc, dien hoc, kien hoa
hoc phan » hoc dan, hoc pho
cong may » cong xay, cong ma, cong hay
may dinh » may tinh, mai dinh, my dinh

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 ((tinh khang) or (dinh huong)) chuyen đe ky thuat: kien hoc phan khoa phan cong may dinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((tinh khang) OR (dinh huong)) chuyen đe ky thuat: kien hoc phan khoa phan cong may dinh.
• Adding a wildcard symbol may retrieve word variants: thuat sach ((tinh khang) or (dinh huong)) chuyen đe ky thuat: kien hoc phan khoa phan cong may dinh*.