Perhaps you should try some spelling variations:
lang khoa » hang khoa, dang khoa, long khoa
cua triet » cua viet, su triet, va triet
khoa hoi » khoan hoi, khoa hoc, khoa doi
hanh lai » hanh lam, hanh tai, thanh lap
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
hieu ve » hieu va, hieu van
thuc va » thuc dan, thuc day
lai cua » dai cua, hai cua, lai chau
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang khoa hoi. hieu ve nam ((thuc va) or (thuc vat)) hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang khoa hoi. hieu ve nam ((thuc va) OR (thuc vat)) hanh lai cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach ky lang khoa hoi. hieu ve nam ((thuc va) or (thuc vat)) hanh lai cua triet*.