Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
tinh cao » tinh lao, tinh chat, tinh cach
tu sach » thu sach, su sach, te sach
lang ha » long ha
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc day
cao cua » ca cua, co cua, cau cua
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
ha hoi » hoa hoi, ha noi, xa hoi
va cam » va cham, va cac, va cao

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 o lang ha hoi. hieu va cam ((thuc va) OR (thuc dan)) tinh cao cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach o lang ha hoi. hieu va cam ((thuc va) OR (thuc dan)) tinh cao cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach o lang ha hoi. hieu va cam ((thuc va) OR (thuc dan)) tinh cao cua vat*.