Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang ma hoi. hieu van cam duc va ((((hanh tai) or (thanh toan))) or (hang tai)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ma hoi. hieu van cam duc va ((((hanh tai) OR (thanh toan))) OR (hang tai)) cua tu.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ma hoi. hieu van cam duc va ((((hanh tai) or (thanh toan))) or (hang tai)) cua tu*.