Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien quy » thien quy, hieu quy, trien quy
thuc dan » thuc hanh, hoc dan
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
ty hang » ly hang, ty xang, thi hang
vai cua » dai cua, hai cua, lai cua
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 hang) or (ky nang)) xa hoi. hieu hien quy ((thuc vat) or (thuc dan)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (ky nang)) xa hoi. hieu hien quy ((thuc vat) OR (thuc dan)) hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (ky nang)) xa hoi. hieu hien quy ((thuc vat) or (thuc dan)) hanh vai cua te*.