Perhaps you should try some spelling variations:
khoan phan » khoan phai, khoan thanh, hoa phan
thuoc sach » hoc sach, nuoc sach, thuat sach
tri thuoc » tri thuc, tri hoc, tin thuoc
sach kien » sach tien, mach dien, sach kinh
kien truc » kien thuc
phan cong » thanh cong
sach tri » sach tai, sach tren, sach bai
truc cac » tuc cac, truc cau, truoc cach
te sach » toc sach
nha he » nha ha, nha h2, nha xe

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach tri thuoc sach nha he thong ) or ( te sach kien truc cac khoan phan cong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tri thuoc sach nha he thong ) OR ( te sach kien truc cac khoan phan cong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tri thuoc sach nha he thong ) or ( te sach kien truc cac khoan phan cong ))*.