Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
su triet » su viet, su tien
ve triet » va trien
hanh lai » hanh lam, hanh tai, thanh lap
cach tu » cach thuc
xa hanh » xa thanh, xa khanh, va hanh
bo sach » co sach, hoc sach
sach ty » sach y, sach tu, sach thu
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang
cac tu » cac thu, cac du, tac tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ty nang cao hoi. hieu vien ((cac tu) or (cach tu)) xa hanh lai ((ve triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ty nang cao hoi. hieu vien ((cac tu) OR (cach tu)) xa hanh lai ((ve triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach ty nang cao hoi. hieu vien ((cac tu) or (cach tu)) xa hanh lai ((ve triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: bo sach ty nang cao hoi. hieu vien ((cac tu) or (cach tu)) xa hanh lai ((ve triet) OR (su triet))*.