Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
hieu vien » hieu hien, thieu nien, hieu tieng
hang di » hang doi, hang vi, hang dien
duoc va » nuoc va, duoc ma, duong va
su sach » so sach, vu 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
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu

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 nang xa hoi. ((hieu vien) or (hieu viec)) sach ((duoc va) OR (duc va)) hang di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. ((hieu vien) OR (hieu viec)) sach ((duoc va) OR (duc va)) hang di cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. ((hieu vien) or (hieu viec)) sach ((duoc va) OR (duc va)) hang di cuu tre*".