Perhaps you should try some spelling variations:
hoach tri » hoach toi, hoach hoi, hoach thu
thuc dung » thuoc dung, thuy dung, tuc dung
dung khoa » dung cho
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
tri thuc » tri tue
khoa he » hoa he, khoa hoc, khong he
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
va hoc » van hoc
hoc he » hoc hien

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 thuc dung khoa he thong ) or ( tu sach tham thuc va hoc he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach tri thuc dung khoa he thong ) OR ( tu sach tham thuc va hoc he thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach tri thuc dung khoa he thong ) or ( tu sach tham thuc va hoc he thong ))*.