Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
cua triet » cua viet, su triet, va triet
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
dao duc » giao duc, tao duoc
ma hoi » mai hoi, xa hoi, ma hoa

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 tru nang ma hoi. hieu van dao duc tan thanh vi ((cua triet) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tru nang ma hoi. hieu van dao duc tan thanh vi ((cua triet) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: su sach tru nang ma hoi. hieu van dao duc tan thanh vi ((cua triet) or (cau tren))*.