Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
thuc hang » thu hang, phuc hang, thuy hang
hang tai » hang va, dung tai
cau tren » cu tren, dau tren, ca tren
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
thuc xa » thuc xay, tuc xa, thuc va
xa hang » va hang, xa bang, xa hung
tai cau » tai cac, tai cao
so san » so sanh, ho san, so ban
ca hoi » cau hoi, cua hoi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so san ((thuc hang) OR (thuc hanh)) ca hoi. hieu va tham thuc xa hang tai cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so san ((thuc hang) OR (thuc hanh)) ca hoi. hieu va tham thuc xa hang tai cau tren".
• Adding a wildcard symbol may retrieve word variants: so san ((thuc hang) OR (thuc hanh)) ca hoi. hieu va tham thuc xa hang tai cau tren*.