Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
dang mam » dang nam, dang mau, dang mat
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
mam hoa » mam hoai, ma hoa, cam hoa
ky dang » ky nang, ky danh
xuc va » tuc va, luc va, xac 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 ky dang mam hoa. hieu van cam ((xuc va) or (duc va)) thanh vai ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang mam hoa. hieu van cam ((xuc va) OR (duc va)) thanh vai ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang mam hoa. hieu van cam ((xuc va) or (duc va)) thanh vai ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang mam hoa. hieu van cam ((xuc va) or (duc va)) thanh vai ((cua triet) OR (su triet))*.