Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
trinh doc » trinh do, trinh hoa, trinh co
hieu vien » hieu viec, thieu nien, hieu tieng
va trinh » van trinh, va tinh, lap trinh
su sach » so sach, vu sach
doc cua » hoc cua, doi cua, do cua
cac duc » cac du, cao duc, cac dac
cua tre » cua te, cuu tre, cua triet
kv nang » ky nang, ki nang, ke nang
v nang » va nang, vu nang, van nang

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 ((v nang) or (kv nang)) xa hoi. ((hieu vien) OR (hieu hien)) cac duc va trinh doc cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((v nang) OR (kv nang)) xa hoi. ((hieu vien) OR (hieu hien)) cac duc va trinh doc cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((v nang) or (kv nang)) xa hoi. ((hieu vien) OR (hieu hien)) cac duc va trinh doc cua tre*".