Perhaps you should try some spelling variations:
ninh viet » sinh vien, anh viet
cua triet » cua viet, su triet, va triet
nam duoc » nam thuoc, da duoc, dat duoc
duoc lam » duoc pham, duoc ly, duoc li
lam ninh » lam tinh, lam linh, lap ninh
viet cua » viec cua, viet ca, viet qua
ky dang » ky nang, ky danh
dang ma » dang mau, dang mam, dang mat
hieu va » hieu qua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang ma hoi. ((hieu va) or (lieu va)) nam duoc lam ninh viet cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang ma hoi. ((hieu va) OR (lieu va)) nam duoc lam ninh viet cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang ma hoi. ((hieu va) or (lieu va)) nam duoc lam ninh viet cua triet*.