Perhaps you should try some spelling variations:
thanh ve » hanh ve, thanh va, thanh vien
thuc dan » thuc hanh, hoc dan
vu sach » vu bach, su sach, vu khach
vu nang » vuc nang, va nang, vu dang
hieu le » hieu ve, hieu he, hieu ly
ve cua » le cua, de cua, te cua
cua te » cua tu
y nang » ky nang, ly nang, v nang
le na » le nam, le va, le ta

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 ((y nang) or (vu nang)) xa hoi. hieu le na ((thuc dan) OR (thuc vat)) thanh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((y nang) OR (vu nang)) xa hoi. hieu le na ((thuc dan) OR (thuc vat)) thanh ve cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((y nang) or (vu nang)) xa hoi. hieu le na ((thuc dan) OR (thuc vat)) thanh ve cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ((y nang) or (vu nang)) xa hoi. hieu le na ((thuc dan) OR (thuc vat)) thanh ve cua te*.