Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hanh tai » thanh tai, hang tai, han tai
hanh lai » hanh lam, thanh lap, thanh loi
nang hoa » nang hoat, hang hoa, nang hoc
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
hoa hoi » khoa hoi, hoa hoc, hoa doi
su sach » so sach, vu sach
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang hoa hoi. hieu ve am thuc va ((hanh lai) OR (hanh tai)) ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang hoa hoi. hieu ve am thuc va ((hanh lai) OR (hanh tai)) ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang hoa hoi. hieu ve am thuc va ((hanh lai) OR (hanh tai)) ((cua triet) or (va triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang hoa hoi. hieu ve am thuc va ((hanh lai) OR (hanh tai)) ((cua triet) or (va triet))*.