Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
nuoc sach » nguoi sach, hoc sach, cuoc cach
va thanh » gia thanh, ban thanh, va tinh
cua viet » ca viet, cua vat, cua dieu
ty nang » ty xang, ty hang, ly nang
qua cac » cua cac
cac lo » cac lop, cac co, cac bo
lo va » lo van, lao va, ly 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 ((ty nang) OR (ky nang)) xa hoi. hieu qua cac lo va thanh tai ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ((ty nang) OR (ky nang)) xa hoi. hieu qua cac lo va thanh tai ((cua viet) OR (hoa viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ((ty nang) OR (ky nang)) xa hoi. hieu qua cac lo va thanh tai ((cua viet) or (hoa viet))".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ((ty nang) OR (ky nang)) xa hoi. hieu qua cac lo va thanh tai ((cua viet) or (hoa viet))*.