Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
hieu hien » bieu hien, dieu hien, chieu chien
bach tuoc » sach duoc, sach nuoc
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
tuoc va » thuoc va, nuoc va, duoc va
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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