Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
phan duc » pham duc, phan tu, phan dau
danh sai » dung sai, danh bat, danh dau
sach ty » sach tu, sach thu, xach tay
va danh » va dinh, va dan, va hanh
sai cua » dai cua, hai cua, lai cua
ang xa » lang xa, mang xa, dang xay
cua tu » cua tuc, cua su, cua cu

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 ty) OR (sach y)) ang xa hoi. hieu van ((phan duc) or (cham soc)) va danh sai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) ang xa hoi. hieu van ((phan duc) OR (cham soc)) va danh sai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach y)) ang xa hoi. hieu van ((phan duc) or (cham soc)) va danh sai cua tu".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach y)) ang xa hoi. hieu van ((phan duc) or (cham soc)) va danh sai cua tu*.