Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
phat thong » phap thong, nhat thuong, pho thong
phan thong » phan thuong, phan hong, phan tong
sach tren » sach tien, sach tranh
sach nghe » sach nghiep, anh nghe, hanh nghe
nghe phan » nghe nhan, nghe thang, nghe dan
hoach ky » hoach xay, hanh ky, hoa ky
nha phat » nham phat, phap phat, tnhh phat
thu sach » tu sach, thuoc sach, khau sach
tren tue » tren que, tren thuc, tri tue
tue sach » te sach, tu sach, theo sach

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 ky thuat sach nha phat thong ) or ( thu sach tren tue sach nghe phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach ky thuat sach nha phat thong ) OR ( thu sach tren tue sach nghe phan thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach ky thuat sach nha phat thong ) or ( thu sach tren tue sach nghe phan thong ))*.