Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
ban thanh » ban hanh, ban hang
thanh du » thanh de, thanh do, thanh tu
sach ty » sach y, sach tu, sach thu
du chat » duoc chat, dung chat, doc chat
xuc ban » duc ban, cuc ban, quoc ban
su sach » so sach, vu sach
nang ro » nang co, nang ho, nang ra
ty nang » ky nang, ty xang, ty hang
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
ve cam » ve cham, ve cac, ve cai
ro hoi » co hoi, o hoi, mo hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang ro hoi. hieu ((ve cam) or (((va cam) OR (va cao)))) xuc ban thanh du chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ro hoi. hieu ((ve cam) OR (((va cam) OR (va cao)))) xuc ban thanh du chat triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ro hoi. hieu ((ve cam) or (((va cam) OR (va cao)))) xuc ban thanh du chat triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ro hoi. hieu ((ve cam) or (((va cam) OR (va cao)))) xuc ban thanh du chat triet*.