Perhaps you should try some spelling variations:
hieu nghiep » lieu nghien, nghiep nghiep, trien nghiep
doanh bat » doanh tai, doanh va
danh bat » anh bai, dinh ba
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
tai khu » tai khoa
sach ky » sac ky, sach y, sach ty
tai thu » thi thu, tai thi, tai tu
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
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: tu sach ky tang ma hoi. hieu nghiep ((tai thu) OR (tai khu)) xa ((danh bat) or (doanh bat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ma hoi. hieu nghiep ((tai thu) OR (tai khu)) xa ((danh bat) OR (doanh bat)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang ma hoi. hieu nghiep ((tai thu) OR (tai khu)) xa ((danh bat) or (doanh bat)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang ma hoi. hieu nghiep ((tai thu) OR (tai khu)) xa ((danh bat) or (doanh bat)) cua tre*.