Perhaps you should try some spelling variations:
sach trien » sach tien, sach tren, sach thieu
trien thuc » trien thuoc, tren thuc, trien thuat
khac thong » khac thuong, khac trong, khap thong
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa khac » khoa kham, khoanh khac, khoa hoc
sach truc » cach thuc, sach tren, sach thu
cach thoi » cac thoi, cach thuc, cach noi
pho thong » he thong
truc phu » thuc phu, tuc phu, truc chua
phu cach » phap cach, thuc cach, thu canh
thoi pho » hoc pho, doi pho, hoi tho
te sach » toc sach

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 trien thuc hanh khoa khac thong ) or ( te sach truc phu cach thoi pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach trien thuc hanh khoa khac thong ) OR ( te sach truc phu cach thoi pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach trien thuc hanh khoa khac thong ) or ( te sach truc phu cach thoi pho thong ))*.