Perhaps you should try some spelling variations:
nguong dan » huong dan
hoc tien » hoc tieng, hoc hien, hoc vien
tien anh » tieng anh, tien manh, dien anh
anh dung » anh dong, anh huong, sach dung
dung van » duong van, dung va, dang van
van nang » van quang, van ban, van dong
cong san » cong tac
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tien anh - anh dung van nang ((nguong dan) or (cong san)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien anh - anh dung van nang ((nguong dan) OR (cong san)) phan cac.
• Adding a wildcard symbol may retrieve word variants: hoc tien anh - anh dung van nang ((nguong dan) or (cong san)) phan cac*.