Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hieu vien » hieu viec, thieu nien, hieu tieng
ban thanh » ban hanh, ban hang
lai cua » hai cua, lai chau, thai cua
duc ban » duc tan, duc van, dua ban
cac duc » cac du, cao duc, cac dac
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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 ty nang xa hoi. ((hieu vien) OR (hieu hien)) cac duc ban thanh ((lai cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. ((hieu vien) OR (hieu hien)) cac duc ban thanh ((lai cua) OR (dai cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. ((hieu vien) OR (hieu hien)) cac duc ban thanh ((lai cua) or (dai cua)) te*".