Perhaps you should try some spelling variations:
phan dang » phan dau, phan cong, nhan dan
luc phan » duc phan, luc nhan, luan phan
cau tren » cu tren, ca tren, cau treo
dau tren » dat tren, dau tieng, dau trong
dau tien » van tien
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
dang va » dang van, dang vat, hang va
ve cac » va cac, vien cac

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 xa hoi. hieu ve cac luc phan dang va ((cau tren) or (((dau tren) or (dau tien))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ve cac luc phan dang va ((cau tren) OR (((dau tren) OR (dau tien)))).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ve cac luc phan dang va ((cau tren) or (((dau tren) or (dau tien))))*.