Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
thuc dan » thuc hanh, hoc dan, thuc vat
sach ky » sach y, sach ty, sach kem
thuc va » thuc vat, thuc day
su tien » su kien, su hien, tu tieng
hieu ve » hieu va, hieu van
nang ho » nang hoc, nang co, tang ho
ho hoi » hoc hoi, hoa hoi, hoi hoi
sac ky » cac ky, sai ky
tai su » tai so, tai tu, lai su
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ky) or (sac ky)) nang ho hoi. hieu ve cam ((thuc va) or (thuc dan)) hanh tai su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ky) OR (sac ky)) nang ho hoi. hieu ve cam ((thuc va) OR (thuc dan)) hanh tai su tien.
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) or (sac ky)) nang ho hoi. hieu ve cam ((thuc va) or (thuc dan)) hanh tai su tien*.