Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tien » sach tren, sach thieu
khoa kham » kho khan, khoa than
kham xung » khac xuong, khac tung, khai ung
tien hoc » tin hoc, tien hoa, dien hoc
thuc cac » thuc cach, tuc cac, thac cac
phuc cac » phuc cam, phuc ca, phuc cham
xung may » dung may, cung may, mang may
vu sach » vu bach, su sach, vu khach
tinh » trinh, dinh, minh

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach tien hoc chuyen đe ky thuat: kien ((thuc cac) OR (phuc cac)) khoa kham xung may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tien hoc chuyen đe ky thuat: kien ((thuc cac) OR (phuc cac)) khoa kham xung may tinh".
• Adding a wildcard symbol may retrieve word variants: vu sach tien hoc chuyen đe ky thuat: kien ((thuc cac) OR (phuc cac)) khoa kham xung may tinh*.