Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hanh vai » hanh va, hanh tai, hanh van
hien cac » thien cac, vien cac, hieu cac
lang van » dang van, tang van, hoang van
sach ty » sach y, sach thu, xach tay
van hoi » van hoa, van hoc, van hoe
sach tu » sach thu, cach tu, sach uu
cac ly » cac ky, cac le, cam ly
cua te » cua tu

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

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