Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
hanh vai » hanh vi, hanh va, hanh tai
nang mai » nang ma, nang tai, lang mai
vai cua » dai cua, hai cua, lai cua
xuc ban » duc ban, cuc ban, quoc ban
xuc van » duc van, luc van, vuc van
sach tu » sach thu, cach tu, sach uu
mai hoi » mai khoi, dai hoi, lai hoi
sach ty » sach y, sach thu, xach tay
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach tu) OR (sach ty)) nang mai hoi. hieu vien cac ((xuc van) or (xuc ban)) hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tu) OR (sach ty)) nang mai hoi. hieu vien cac ((xuc van) OR (xuc ban)) hanh vai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) OR (sach ty)) nang mai hoi. hieu vien cac ((xuc van) or (xuc ban)) hanh vai cua tu".
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) OR (sach ty)) nang mai hoi. hieu vien cac ((xuc van) or (xuc ban)) hanh vai cua tu*.