Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
hoi dang » hoi dan, hoi lang, hai dang
hoi dong » hop dong, hoat dong, ha dong
danh ve » dinh ve, hanh ve, anh ve
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
vu sach » vu bach, su sach, vu khach
van cau » van dau, van hau, van chat
van cam » van nam, van lam, van dam
ve va » ve van, te va, ke va

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 ((hoi dang) or (hoi dong)) xa hoi. hieu ((van cam) OR (van cau)) thuc va danh ve va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((hoi dang) OR (hoi dong)) xa hoi. hieu ((van cam) OR (van cau)) thuc va danh ve va trien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((hoi dang) or (hoi dong)) xa hoi. hieu ((van cam) OR (van cau)) thuc va danh ve va trien*".