Perhaps you should try some spelling variations:
thien van » thi van
phan dau » phan tu, hang dau
luc phan » duc phan, luc nhan, luan phan
van cam » van nam, van lam, van cau
cam luc » cam xuc, cau luc
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
vat cau » van cau, vat hau, vat cach
tu sach » thu sach, su sach, te sach
va cau » van cau, va cac, va dau
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. thien van cam luc phan dau ((((vat cau) OR (va cau))) or (dat cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. thien van cam luc phan dau ((((vat cau) OR (va cau))) OR (dat cau)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. thien van cam luc phan dau ((((vat cau) OR (va cau))) or (dat cau)) tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. thien van cam luc phan dau ((((vat cau) OR (va cau))) or (dat cau)) tren*.