Perhaps you should try some spelling variations:
thien van » thi van
hanh dai » hanh tai, hanh dao, vanh dai
va hanh » van hanh, va thanh, va danh
cau tuc » cau tu, cau luc, cau phuc
sach ky » sac ky, sach y, sach ty
te sach » toc sach
tang xa » trang xa, lang xa, tang ha
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet

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) or (tang ma)) hoi. thien van ((cau tuc) OR (cau truc)) va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((tang xa) OR (tang ma)) hoi. thien van ((cau tuc) OR (cau truc)) va hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((tang xa) or (tang ma)) hoi. thien van ((cau tuc) OR (cau truc)) va hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((tang xa) or (tang ma)) hoi. thien van ((cau tuc) OR (cau truc)) va hanh dai cua tre*.