Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
hang doi » hang loi, huong doi, hang tai
cac thuc » cach thuc, cac thu, can thuc
tu sach » thu sach, su sach, te sach
hang di » hang vi, hang dien, hang dich
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
y lang » _ lang, tay lang, yen lang
o lang » hoa lang, hoi lang
thiet* » thieu*

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((y lang) or (o lang)) xa hoi. hieu ve cac thuc dan ((hang di) OR (hang doi)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y lang) OR (o lang)) xa hoi. hieu ve cac thuc dan ((hang di) OR (hang doi)) va thiet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y lang) or (o lang)) xa hoi. hieu ve cac thuc dan ((hang di) OR (hang doi)) va thiet*".