Perhaps you should try some spelling variations:
ban hanh » ban hang
cac tuc » cac toc, cac tu, cac tac
vai cua » dai cua, hai cua, lai cua
doi cua » dai cua, hoi cua
tuc ban » thuc ban, truc ban, tu ban
sanh ky » hanh ky, nganh ky, thanh ky
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sang ky » sang kyo, dang ky, tang ky
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sanh ky) OR (sang ky)) nang xa hoi. hieu ve cac tuc ban hanh ((doi cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sanh ky) OR (sang ky)) nang xa hoi. hieu ve cac tuc ban hanh ((doi cua) OR (vai cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sanh ky) OR (sang ky)) nang xa hoi. hieu ve cac tuc ban hanh ((doi cua) or (vai cua)) triet*".