Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
thanh ve » hanh ve, thanh va, thanh vien
toc sac » toc sach, hoc sach, doc sach
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
duc ban » duc tan, duc van, dua ban
ha hoi » hoa hoi, ha noi, xa hoi
ve cua » le cua, de cua, te cua
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 sac) or (toc san)) ky dang ha hoi. hieu van pham duc ban thanh ve cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sac) OR (toc san)) ky dang ha hoi. hieu van pham duc ban thanh ve cua tu.
• Adding a wildcard symbol may retrieve word variants: ((toc sac) or (toc san)) ky dang ha hoi. hieu van pham duc ban thanh ve cua tu*.