Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tien » sach tren, sach thieu
kham xung » khac xuong, khai ung, nham ung
khac tung » khac thuong, khac xuong, khai ung
tien hoc » tin hoc, tien hoa, dien hoc
thuc cac » thuc cach, tuc cac, phuc cac
cac khoa » cac khoan, cac khoi, dac khoa
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 khoa ((kham xung) OR (khac tung)) 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 khoa ((kham xung) OR (khac tung)) may tinh".
• Adding a wildcard symbol may retrieve word variants: vu sach tien hoc chuyen đe ky thuat: kien thuc cac khoa ((kham xung) OR (khac tung)) may tinh*.