Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
tuong dan » huong dan, tung dan, xuong dan
anh tang » anh bang, anh dang, anh nang
chi lang » thi lan, hoi lang, chi dan
dan toan » van toan, dan than, manh toan
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 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 toan cao".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - anh tang ((chi lang) OR (chi van)) tuong dan toan cao*.