Perhaps you should try some spelling variations:
tinh vien » sinh vien, tinh dien, tinh viet
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
nam tuc » nam thuc, nam truc, nam tu
xa tinh » va tinh, ha tinh, ca tinh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
va nam » van nam, ha nam, va nay

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 hoi. hieu va nam tuc xa tinh vien ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ma hoi. hieu va nam tuc xa tinh vien ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. hieu va nam tuc xa tinh vien ((cua triet) or (va triet))*.