Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
vai cua » dai cua, hai cua, lai cua
sach ty » sach y, sach tu, sach thu
te sach » toc sach
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
cac lo » cac lop, cac co, cac bo
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: te sach ty ((nang xa) OR (nang x)) hoi. hieu ve cac lo ((van hanh) or (ban hanh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (nang x)) hoi. hieu ve cac lo ((van hanh) OR (ban hanh)) vai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) OR (nang x)) hoi. hieu ve cac lo ((van hanh) or (ban hanh)) vai cua triet*".