Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
tuong dan » huong dan, tung dan, truong dai
xuong dan » huong dan, xuong san, nguong dan
anh tang » anh bang, anh dang, anh nang
chi lang » thi lan, hoi lang, chi dan
toan cao » toan ban, toan tap
chi van » thi van, chu van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - anh tang ((chi lang) or (chi van)) ((tuong dan) OR (xuong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - anh tang ((chi lang) OR (chi van)) ((tuong dan) OR (xuong dan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - anh tang ((chi lang) or (chi van)) ((tuong dan) OR (xuong dan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - anh tang ((chi lang) or (chi van)) ((tuong dan) OR (xuong dan)) toan cao*.