Perhaps you should try some spelling variations:
khoan khau » khoanh khac, khoa kham, khoa phau
phan thong » phan thuong, phan hong, phan tong
khau thong » khau thuong, khap thong, khau tong
khoa phan » hoa phan, khoa than, khoa phau
hoach dat » hoach xay, hoc dat, hoach va
dat thieu » dat hieu, dat tieu, dat thien
thieu cac » hieu cac, thien cac, hieu ca
sach han » sach tham, sach danh, sach nang
han thuc » nhan thuc, phan thuc, dan thuc
thuc cac » thuc cach, tuc cac, phuc cac
cac khoa » cac khoi, dac khoa, cao khoa
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: (( tu sach han thuc cac khoa phan thong ) or ( thu hoach dat thieu cac khoan khau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach han thuc cac khoa phan thong ) OR ( thu hoach dat thieu cac khoan khau thong ))*.