Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
cua triet » cua viet, su triet, va triet
trinh di » trinh do, trinh dien, trinh dinh
va trinh » van trinh, va tinh, lap trinh
nang mai » nang ma, nang tai, lang mai
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, te sach, tu cach
mai hoi » mai khoi, dai hoi, lai hoi
su sach » so sach, vu sach
viec da » viec dat, vien da, viec va
da tuc » dao tuc, va tuc, da tac
tuc va » thuc va, truc va, tuc xa

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) or (su sach)) ky nang mai hoi. hieu viec da tuc va trinh di ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang mai hoi. hieu viec da tuc va trinh di ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang mai hoi. hieu viec da tuc va trinh di ((cua tre) OR (cua triet))*".