Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
thuc dan » thuc hanh, hoc dan, thuc vat
vai cau » va cau, van cau, vai cac
dan vai » dan va, dan tai, dan vat
thuc va » thuc vat, thuc day
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
sac ky » cac ky
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sac ky) OR (sai ky)) tang xa hoi. hieu va nam ((thuc va) or (thuc dan)) dan vai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sac ky) OR (sai ky)) tang xa hoi. hieu va nam ((thuc va) OR (thuc dan)) dan vai cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sac ky) OR (sai ky)) tang xa hoi. hieu va nam ((thuc va) or (thuc dan)) dan vai cau treo".
• Adding a wildcard symbol may retrieve word variants: toc ((sac ky) OR (sai ky)) tang xa hoi. hieu va nam ((thuc va) or (thuc dan)) dan vai cau treo*.