Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van triet » va triet, van thiet, van trieu
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » va thanh, va danh, ban hanh
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ky nang ma hoi. hieu vien cac xuc ((va hanh) or (van hanh)) vi van triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ma hoi. hieu vien cac xuc ((va hanh) OR (van hanh)) vi van triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ma hoi. hieu vien cac xuc ((va hanh) or (van hanh)) vi van triet*.