Perhaps you should try some spelling variations:
thanh toan » thanh hoa, tinh toan
cham tuc » nham thuc, pham thuc, tham thuc
tu sach » thu sach, te sach, tu cach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet

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