Perhaps you should try some spelling variations:
hoc viet » hoc hien
sach cap » sach dao, sach bai, sach xa
cap bang » cao bang, can bang, lap bang
bang may » mang may, ban may, bang tay
lang voi » lanh voi, khang voi, lang cuoi
hoa lang » hoa dan, hoa van
tuc hoa » truc hoa, duc hoa, tuc ha
te sach » toc sach
may hoi » may thoi, tay hoi, mai hoi
ve daut » ve dat
ve dau » va dau, ve du, ke dau

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 cap bang may hoi. hieu ((ve dau) or (ve daut)) tuc hoa lang voi ((so viet) or (hoc viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach cap bang may hoi. hieu ((ve dau) OR (ve daut)) tuc hoa lang voi ((so viet) OR (hoc viet)).
• Adding a wildcard symbol may retrieve word variants: te sach cap bang may hoi. hieu ((ve dau) or (ve daut)) tuc hoa lang voi ((so viet) or (hoc viet))*.