Perhaps you should try some spelling variations:
hoach kien » hoach chien, hanh kien, hoa kien
thuoc sach » hoc sach, nuoc sach, thuat sach
sach trinh » sach tranh, hanh trinh, sach kinh
trinh thuc » trinh tu, trinh thi
thuc cach » truoc cach, thuc hanh, tuc cac
cach khoa » bach khoa, cac khoa, cac khoan
phu thong » phap thong, khau thong, phan thong
pho thong » he thong
khoa phu » khoa phau, khoa thu, hoa phu
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa pho » khoa khoa, khoa phau, khoa hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu hoach kien thuc cach khoa phu thong ) or ( thuoc sach trinh thuc anh khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach kien thuc cach khoa phu thong ) OR ( thuoc sach trinh thuc anh khoa pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach kien thuc cach khoa phu thong ) or ( thuoc sach trinh thuc anh khoa pho thong ))*.