Perhaps you should try some spelling variations:
danh thai » anh thai, dang thai, dinh thai
su triet » su viet, su tien, ve triet
van chat » cao chat
va chat » va phat, cao chat, hoa chat
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet
te sach » toc sach

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 tang xa hoi. hieu ((va chat) OR (van chat)) duc va danh thai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky tang xa hoi. hieu ((va chat) OR (van chat)) duc va danh thai ((cua tre) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky tang xa hoi. hieu ((va chat) OR (van chat)) duc va danh thai ((cua tre) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky tang xa hoi. hieu ((va chat) OR (van chat)) duc va danh thai ((cua tre) or (su triet))*.