Perhaps you should try some spelling variations:
than thong » than thuong, toan thong, tran thong
khoan khau » khoanh khac, khoa kham, khoa phau
hoach tri » hoach toi, hoach hoi, hoach thu
khoa than » khoa luan, hoa thai, hoa tan
khau tong » khau thong, khau cong, khau thuong
cac khoa » cac khoi, dac khoa, cao khoa
sach tai » sach bai, sach tham, sach dao
tai thuc » thai thuc, tri thuc, dai thuc
thuc cac » thuc cach, tuc cac, phuc cac
tue cac » tu cac, tuc cac, te cac
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 tri tue cac khoa than thong ) or ( tu sach tai thuc cac khoan khau tong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach tri tue cac khoa than thong ) OR ( tu sach tai thuc cac khoan khau tong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach tri tue cac khoa than thong ) or ( tu sach tai thuc cac khoan khau tong ))*.