Perhaps you should try some spelling variations:
phan thong » phan thuong, phan hong, phan tong
sach truc » cach thuc, sach tren, sach thu
khoan phu » khoa phu, khoan phai, khoa thu
phu thong » pho thong, phap thong, khau thong
thuc cach » thuoc sach, truoc cach, thuc hanh
thu sach » tu sach, thuat sach, thuoc sach
cach dao » sach dao, cach bao, cach nao
dao thuc » dan thuc, dao tuc, do thuc
cach hoc » cach thuc, cach thoi, dich hoc
hoc phan » hoc dan, hoc pho
truc ve » thuc ve, truc va, truc van
tu cach » tu cac
ve cac » va cac, vien cac

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 truc ve cac khoan phu thong ) or ( tu cach dao thuc cach hoc phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach truc ve cac khoan phu thong ) OR ( tu cach dao thuc cach hoc phan thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu sach truc ve cac khoan phu thong ) or ( tu cach dao thuc cach hoc phan thong ))*.