Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
hanh vai » hanh vi, hanh va, hanh tai
vien cac » vien bach, vien dai, vien da
tu sach » thu sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » tuc va, luc va, xac 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 sach) or (su sach)) ty nang ma hoi. hieu vien cac ((xuc va) or (duc va)) hanh vai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang ma hoi. hieu vien cac ((xuc va) OR (duc va)) hanh vai cua vat.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang ma hoi. hieu vien cac ((xuc va) or (duc va)) hanh vai cua vat*.