Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vai » danh sai, doanh van, dang van
thuc dan » thuc hanh, hoc dan, thuc vat
nang noi » nang doc
noi hoi » noi doi, doi hoi, hoi hoi
hieu va » lieu va, hieu qua
sach ky » sach y, sach ty, sach kem
danh va » doanh va, hanh va, anh va
sac ky » cac ky, sai ky
va am » va lam, 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: thu ((sach ky) OR (sac ky)) nang noi hoi. hieu va am thuc dan ((danh vai) or (danh va)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sac ky)) nang noi hoi. hieu va am thuc dan ((danh vai) OR (danh va)) cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sac ky)) nang noi hoi. hieu va am thuc dan ((danh vai) or (danh va)) cua triet*".