Perhaps you should try some spelling variations:
hoc viet » hoc hien
che bang » chu bang, che nang, che quang
bang may » mang may, ban may, bang tay
lang voi » lanh voi, khang voi, lang cuoi
sach che » sach thue, sach nha, sach cap
va lang » va nang, hoa lang
truc va » thuc va, thuc vat, trung va
te sach » toc sach
may hoi » may thoi, tay hoi, mai hoi
ve dut » ve dat, ve duc
ve du » ve su, te du, va du

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