Perhaps you should try some spelling variations:
sinh viec » sinh vien, dinh viec, ninh viet
cua triet » cua viet, su triet, va triet
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
sac ky » cac ky
ma hoi » mai hoi, xa hoi, ma hoa
va nam » van nam, ha nam, va nay
luc va » tuc va, loc 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) or (sai ky)) nang ma hoi. hieu va nam ((luc va) OR (duc va)) sinh viec cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) nang ma hoi. hieu va nam ((luc va) OR (duc va)) sinh viec cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (sai ky)) nang ma hoi. hieu va nam ((luc va) OR (duc va)) sinh viec cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sai ky)) nang ma hoi. hieu va nam ((luc va) OR (duc va)) sinh viec cua triet*.