Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sinh viec » sinh vien, dinh viec, ninh viet
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
tang ma » mang may, tang van
nam luc » nang luc, nhan luc, nam duoc
va sinh » va kinh, va tinh, vi sinh
nang ma » sang ma, nang cao, mang may
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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 ma) OR (tang ma)) hoi. hieu van ((nam luc) or (nam thuc)) va sinh viec cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang ma) OR (tang ma)) hoi. hieu van ((nam luc) OR (nam thuc)) va sinh viec cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang ma) OR (tang ma)) hoi. hieu van ((nam luc) or (nam thuc)) va sinh viec cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang ma) OR (tang ma)) hoi. hieu van ((nam luc) or (nam thuc)) va sinh viec cua triet*.