Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh dat » thanh san, thanh hai, thanh van
dat cua » dai cua, day cua, mat cua
cuc ban » cua ban, cac ban, cuu ban
duc ban » duc tan, duc van, dua ban
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, mang may
va nay » va ngay, va cay

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 ty ((nang ma) or (nang cao)) hoi. hieu va nay ((duc ban) or (cuc ban)) thanh dat cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang ma) OR (nang cao)) hoi. hieu va nay ((duc ban) OR (cuc ban)) thanh dat cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang ma) or (nang cao)) hoi. hieu va nay ((duc ban) or (cuc ban)) thanh dat cua triet*.