Perhaps you should try some spelling variations:
lang khoa » hang khoa, dang khoa, long khoa
nhanh dai » nhan dai, nhanh hai, nhanh thai
khoa hoi » khoan hoi, khoa hoc, khoa doi
va nhanh » va thanh, va hanh, va nhan
so sach » so sanh, bo sach, co sach
hieu vu » hieu va, hieu ve, hieu su
vu chao » vu cao, vu cham, vu chat
cua tre » cua te, cuu tre, cua triet
xu va » xu van, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach _ lang khoa hoi. hieu vu chao xu va nhanh dai cua tre~.
• Adding a wildcard symbol may retrieve word variants: so sach _ lang khoa hoi. hieu vu chao xu va nhanh dai cua tre*.