Perhaps you should try some spelling variations:
khoan khau » khoanh khac, khoa kham, han khau
khau thong » khau thuong, khap thong, khau tong
sach pham » sach tham, sach phat, sach phap
pham thuc » phap thuc, pham chuc, nham thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, anh khoa
khoa phau » hoa phan, khoa kham, khoa than
phau hong » pham hong, phan hong, phap phong
hoach dat » hoach xay, hoc dat, hoach va
tu sach » thu sach, su sach, te sach
dat thu » dat phu, sat thuc, dat tieu
thu cac » tu cac, thu xac, thu cuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach pham thuc cach khoa phau hong ) or ( thu hoach dat thu cac khoan khau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach pham thuc cach khoa phau hong ) OR ( thu hoach dat thu cac khoan khau thong ))*.