Perhaps you should try some spelling variations:
ve triet » va trien, su triet
dong mau » dong ma, dang mau, dong ha
tan anh » tuan anh, tran anh, toan anh
hoc sac » hoc sach, hoc cac, hoc mac
van cam » van lam, van cau, van dam
mau hoi » cau hoi, mai hoi, mau ho
ky dong » ly dong, ky dang, ky cong
sac ky » cac ky, sai ky
anh vi » hanh vi, anh va, anh ve
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sac ky dong mau hoi. hieu ((van cam) or (van nam)) duc tan anh vi ((cua te) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky dong mau hoi. hieu ((van cam) OR (van nam)) duc tan anh vi ((cua te) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: hoc sac ky dong mau hoi. hieu ((van cam) or (van nam)) duc tan anh vi ((cua te) or (ve triet))*.