Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
sach tham » sach nha
viec bach » vien bach, viec ban, viec bao
hanh lai » hanh lam, hanh tai, thanh lap
bach xuc » bach tuoc, bach xuan, bach hue
cua viet » ca viet, hoa viet, cua vat
mai khoa » tai khoa, may khoa, dai khoa
nang mai » nang ma, nang tai, lang mai
sach tu » sach thu, cach tu, sach ty
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
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 tham)) nang mai khoa. hieu viec bach xuc va hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach tham)) nang mai khoa. hieu viec bach xuc va hanh lai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach tham)) nang mai khoa. hieu viec bach xuc va hanh lai cua viet*.