Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
hoach nam » hoc nam, hoach xay, hoang nam
thuc bach » thuc cach, thuoc sach, thuc hanh
bach khoa » anh khoa
khoa kham » kho khan, khoa than
nam thuc » nam thuoc, am thuc, nam thu
nha truc » nha thuoc, nha tu, ba truc
tu sach » thu sach, su sach, te sach
khoa he » hoa he, khoa hoc, khong he

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 nam thuc bach khoa kham thong ) or ( tu sach nha truc bach khoa he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach nam thuc bach khoa kham thong ) OR ( tu sach nha truc bach khoa he thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach nam thuc bach khoa kham thong ) or ( tu sach nha truc bach khoa he thong ))*.