Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
va trien » va truyen, va thiet, va tuyen
vu sach » vu bach, su sach, vu khach
dai hoi » dai hoc, dai hai, dai moi
hieu va » lieu va, hieu qua
cam tuc » cam tu, nam thuc, dam thuc
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
y nang » ky nang, ly nang, v nang
vi va » vi van, vai va, vu 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 y nang dai hoi. hieu va ((cam tuc) or (cam xuc)) va danh vi va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang dai hoi. hieu va ((cam tuc) OR (cam xuc)) va danh vi va trien*.