Perhaps you should try some spelling variations:
sach triet » sach thieu, sach tien, sach tren
hoc chuyen » khong chuyen
thuc cach » thuoc sach, truoc cach, thuc hanh
cung quy » cong quy, dung quy, nhung quy
vu sach » vu bach, su sach, vu khach
ha phan » hoa phan, hai phan, ha pha
va phan » van phan, va phat, va phap

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 triet hoc chuyen đe ky thuat: kien thuc cach ((ha phan) OR (va phan)) cung quy dinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach triet hoc chuyen đe ky thuat: kien thuc cach ((ha phan) OR (va phan)) cung quy dinh".
• Adding a wildcard symbol may retrieve word variants: vu sach triet hoc chuyen đe ky thuat: kien thuc cach ((ha phan) OR (va phan)) cung quy dinh*.