Perhaps you should try some spelling variations:
thuc dan » thuc hanh, thuc vat
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
hanh ve » hanh vi, hanh va, hanh kem
y nang » ly nang, v nang, may nang
va cau » van cau, va cac, va dau
ve cua » le cua, de cua, te cua
cua te » cua tu

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 nang) or (ky nang)) xa hoi. hieu va cau ((thuc dan) OR (hoc dan)) hanh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ky nang)) xa hoi. hieu va cau ((thuc dan) OR (hoc dan)) hanh ve cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (ky nang)) xa hoi. hieu va cau ((thuc dan) OR (hoc dan)) hanh ve cua te*".