Perhaps you should try some spelling variations:
may thoi » gay thoi, may thi, tay thoi
hieu van » hieu va, thien van, lieu va
cham luc » cham soc, nhan luc, cham cuu
danh dau » lanh dao, hang dau, danh tu
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
hieu ve » hieu va
va danh » va dinh, va dan, va hanh
dau cua » dai cua, day cua, cau cua
y mang » cay mang
luc va » duc va, tuc va, loc va

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 y mang may thoi. ((hieu ve) or (hieu van)) cham luc va danh dau cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y mang may thoi. ((hieu ve) OR (hieu van)) cham luc va danh dau cua viet.
• Adding a wildcard symbol may retrieve word variants: te sach y mang may thoi. ((hieu ve) or (hieu van)) cham luc va danh dau cua viet*.