Perhaps you should try some spelling variations:
sach tham » sach nha
tham nang » nham nang, tham lang, tham nhung
cua triet » cua viet, su triet
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
tham dua » tham du, pham duc, pham duy
ban hanh » ban hang
hanh lai » hanh lam, hanh tai, thanh lap
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
dua ban » dia ban, cua ban, qua ban
x hoi » xa hoi, o hoi, x ho

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 tham nang x hoi. hieu van tham dua ban hanh lai ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tham nang x hoi. hieu van tham dua ban hanh lai ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: su sach tham nang x hoi. hieu van tham dua ban hanh lai ((cua triet) or (va triet))*.