Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tham soc » cham soc, tham nuoc, thai son
su sach » so sach, vu sach
va tham » van tham, va cham, va thanh
tang ma » mang may, tang van
sang ma » nang ma, sang tao, mang may
soc va » hoc va, loc va, doc va
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((sang ma) or (tang ma)) hoi. lieu va tham soc va dan vi ((cua triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((sang ma) OR (tang ma)) hoi. lieu va tham soc va dan vi ((cua triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: su sach y ((sang ma) or (tang ma)) hoi. lieu va tham soc va dan vi ((cua triet) or (va thiet))*.