Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh vien » sinh vien, tinh dien, tinh viet
nang mai » nang ma, nang tai, lang mai
vien cua » viec cua, dien cua, tien cua
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » hieu qua
nam xua » nam cua, nam mua, nam qua
va tinh » may tinh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
xua va » xuat va, vua va, sua 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 sac ky nang mai hoi. ((lieu va) or (hieu va)) nam xua va tinh vien cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang mai hoi. ((lieu va) OR (hieu va)) nam xua va tinh vien cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang mai hoi. ((lieu va) or (hieu va)) nam xua va tinh vien cua triet*.