Perhaps you should try some spelling variations:
huu them » huu thu, huu thuc, huu liem
dang van » hoang van, hang va
hanh dai » hanh tai, hanh dao, vanh dai
huu tre » huu tri, cuu tre, huu tien
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
thuc va » thuc dan, thuc day
hieu va » lieu va, hieu qua
ky dang » ky nang, ky danh
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: vu sach ky dang van hoa. hieu va cam ((thuc va) OR (thuc vat)) hanh dai ((huu tre) or (huu them))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky dang van hoa. hieu va cam ((thuc va) OR (thuc vat)) hanh dai ((huu tre) OR (huu them)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky dang van hoa. hieu va cam ((thuc va) OR (thuc vat)) hanh dai ((huu tre) or (huu them))".
• Adding a wildcard symbol may retrieve word variants: vu sach ky dang van hoa. hieu va cam ((thuc va) OR (thuc vat)) hanh dai ((huu tre) or (huu them))*.