Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh tai » thanh hai, thanh toan, doanh tai
cua triet » cua viet, su triet, va triet
nang cai » nang cao, nang tai, nang cap
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cai hoi » cau hoi, dai hoi, cai hoa
va cham » va chat, va tham
duc van » duc va, duc tan, duc manh
tai cua » thai cua, tai cuc, tri cua
ve cam » ve cham, ve cac, va cam

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 ky nang cai hoi. hieu ((ve cam) or (va cham)) duc van thanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang cai hoi. hieu ((ve cam) OR (va cham)) duc van thanh tai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang cai hoi. hieu ((ve cam) or (va cham)) duc van thanh tai cua triet*.