Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec bach » vien bach, viec ban, viec bao
sach thu » sach thue, sach thieu, sach tham
nang mai » nang ma, nang tai, lang mai
mai khoa » tai khoa, may khoa, dai khoa
bach xuc » bach tuoc, bach xuan, bach hue
hanh dai » hanh tai, hanh dao, vanh dai
cua viet » ca viet, hoa viet, cua vat
sach tu » cach tu, sach ty, sach uu
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va

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 tu) or (sach thu)) nang mai khoa. hieu viec bach xuc va hanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach thu)) nang mai khoa. hieu viec bach xuc va hanh dai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach thu)) nang mai khoa. hieu viec bach xuc va hanh dai cua viet*.