Perhaps you should try some spelling variations:
thanh thoi » hanh thoi, thanh pho, thanh hoa
bac thanh » ban thanh, cac thanh, tai thanh
hoc sach » hoc sinh, hoc anh
dang cac » dung cac, bang cac, dong cac
cac phoi » cac thoi, cac khoi, cap phoi
thoi cua » hoi cua, thai cua, troi cua
hoc cac » hoc cao
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
cac dac » cac dan, cac dai, cac bac
dac bac » dac sac, cac bac, dan bac
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (hoc cac)) ky dang cac phoi. hieu ve cac dac bac thanh thoi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) ky dang cac phoi. hieu ve cac dac bac thanh thoi cua vat.
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (hoc cac)) ky dang cac phoi. hieu ve cac dac bac thanh thoi cua vat*.