Perhaps you should try some spelling variations:
nhieu vien » nhieu viec, nhiet dien, thieu nien
cua triet » cua viet, su triet, va triet
trinh vi » trinh va, trinh ve, trinh viet
va trinh » van trinh, va tinh, lap trinh
thu sach » tu sach, thuat sach, thuoc sach
nang ma » tang ma, sang ma, nang cao
cac duc » cao duc, cac dac, cac nuoc
su sach » so sach, vu sach
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (su sach)) ky nang ma hoi. nhieu vien ((cac duc) or (cac du)) va trinh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky nang ma hoi. nhieu vien ((cac duc) OR (cac du)) va trinh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky nang ma hoi. nhieu vien ((cac duc) or (cac du)) va trinh vi cua triet*.