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