Perhaps you should try some spelling variations:
khan thong » khap thong, khau thong, nhan thong
pho thong » he thong
sach tren » sach tien, sach tranh
tren thuc » trien thuc, tron thuc, trinh thuc
hoach xa » hoach xay, hoach va, hoach ha
thuc cac » thuc cach, tuc cac, phuc cac
hanh kho » hanh khu, hang khoa, hanh theo
kho khan » khoa kham, khoa than
xa thuc » va thuc, xa phuc, a thuc
cac toi » cac thoi
toi pho » doi pho, toi pham
tu sach » thu sach, su sach, te 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 xa thuc cac toi pho thong ) or ( tu sach tren thuc hanh kho khan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach xa thuc cac toi pho thong ) OR ( tu sach tren thuc hanh kho khan thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach xa thuc cac toi pho thong ) or ( tu sach tren thuc hanh kho khan thong ))*.