Perhaps you should try some spelling variations:
phan thuong » hang thuong, phan xuong
truc thuoc » thuc thuc, tri thuoc, tu thuoc
thuat sach » thuat lanh, thuat san
cach truc » cach thuc, sach truc, cau truc
thuoc dac » thuoc dang, thuoc sach, thuc dan
dac khoan » cac khoan, dac khoa, dai khoang
khoan pho » khoan nhoi, khoan phai, khoan hoi
pho thong » he thong
thuc cach » thuoc sach, truoc cach, thuc hanh
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
cach hoa » cach hoan, cach hoc, bach hoa
hoa phan » hoa dan, co phan
tu cach » tu cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu cach truc thuoc dac khoan pho thong ) or ( thuat sach tri thuc cach hoa phan thuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach truc thuoc dac khoan pho thong ) OR ( thuat sach tri thuc cach hoa phan thuong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach truc thuoc dac khoan pho thong ) or ( thuat sach tri thuc cach hoa phan thuong ))*.