Perhaps you should try some spelling variations:
may thoi » gay thoi, may thi, tay thoi
cham luc » cham soc, nhan luc, cham cuu
hang dau » hang va, hang tai
va triet » va thiet, va trien, ve triet
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hang » van hang, va nang, va lang
y mang » cay mang
luc va » duc va, tuc va, loc va
dau va » dau ve, lau 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 ((mai hoi) or (may thoi)). hieu ve cham luc va hang dau va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y mang ((mai hoi) OR (may thoi)). hieu ve cham luc va hang dau va triet.
• Adding a wildcard symbol may retrieve word variants: te sach y mang ((mai hoi) or (may thoi)). hieu ve cham luc va hang dau va triet*.