Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
danh doi » danh di, thanh doi, dung doi
tuoc va » thuoc va, nuoc va, tuc va
doi cua » dai cua, hoi cua
duoc va » nuoc va, duc va, duoc ma
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
sai ky » sac ky

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 ky) or (sai ky)) nang xa hoi. hieu vien bach ((tuoc va) or (duoc va)) danh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sai ky)) nang xa hoi. hieu vien bach ((tuoc va) OR (duoc va)) danh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sai ky)) nang xa hoi. hieu vien bach ((tuoc va) or (duoc va)) danh doi cua tre*.