Perhaps you should try some spelling variations:
thanh toan » thanh hoa, tinh toan
nuoc sach » nguoi sach, hoc sach, cuoc cach
cua viet » ca viet, hoa viet, cua vat
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cac lo » cac lop, cac bo, cac ho
cac co » cac cong

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