Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
cham thuc » nham thuc, pham thuc, tham thuc
toc sach » hoc sach, doc sach, thuoc sach
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
thuc va » thuc vat, thuc dan, thuc day
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
cuu tre » cua tre, cau tren, cau treo

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 (toc sach)) ly nang xa hoi. hieu ve cham thuc va ((thanh toan) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ly nang xa hoi. hieu ve cham thuc va ((thanh toan) OR (hanh va)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ly nang xa hoi. hieu ve cham thuc va ((thanh toan) or (hanh va)) cuu tre*.