Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu vien » hieu hien, hieu viec, thieu nien
thuc dan » thuc hanh, hoc dan, thuc vat
vien cac » vien bach, vien dai, vien da
nang ma » tang ma, sang ma, nang cao
thuc va » thuc vat, thuc day
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua
tu sac » tu cac, tu san, tu bac

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