Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
nuoc sach » nguoi sach, hoc sach, cuoc cach
hieu cua » dieu cua, bieu cua, hieu ca
nang xa » nang x, lang xa, nang ma
ca viet » va viet, co viet, hoa viet
y nang » ky nang, ly nang, v nang
tai ca » tai cac, tai cao, tai cua
lo va » lo van, lao va, le va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach y nang xa hoi. ((hieu cua) OR (hieu qua)) cac ((lo va) or (ly va)) thanh tai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach y nang xa hoi. ((hieu cua) OR (hieu qua)) cac ((lo va) OR (ly va)) thanh tai ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach y nang xa hoi. ((hieu cua) OR (hieu qua)) cac ((lo va) or (ly va)) thanh tai ca viet".
• Adding a wildcard symbol may retrieve word variants: nuoc sach y nang xa hoi. ((hieu cua) OR (hieu qua)) cac ((lo va) or (ly va)) thanh tai ca viet*.