Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
trien hoat » tien hoa
hoat huyen » hoa huyen, dat huyen, hoi huyen
khoa phau » hoa phan, khoa kham, khoa than
phau cung » phan cung, pha cung, phap cung
quy trinh » qua trinh, quy dinh
thu sach » tu sach, thuoc sach, thu hoach
thuc day » thuc dan, thuc vat
day khoa » da khoa, may khoa, dac khoa
cung quy » cong quy, dung quy, nhung quy

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (thuat sach)) trien hoat huyen đe ky thuat: kien thuc day khoa phau cung quy trinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) trien hoat huyen đe ky thuat: kien thuc day khoa phau cung quy trinh".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuat sach)) trien hoat huyen đe ky thuat: kien thuc day khoa phau cung quy trinh*.