Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
va trinh » van trinh, va tinh, lap trinh
trinh te » trinh tu, trinh he, trinh ke
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
cua luc » cua duc, cua tuc, cua cuc
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va
te cua » tue cua, le cua, de cua

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 ma hoi. nhieu viec cua luc va trinh te cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ma hoi. nhieu viec cua luc va trinh te cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ma hoi. nhieu viec cua luc va trinh te cua tre*.