Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
va triet » va thiet, va trien, ve triet
van hanh » ban hanh, van anh, van ban
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
va cham » va chat, va tham
ve cam » ve cham, ve cac, va cam
vi va » vi van, vai va, vu va

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 xa hoi. hieu ((ve cam) or (va cham)) tuc ((van hanh) OR (van thanh)) vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((ve cam) OR (va cham)) tuc ((van hanh) OR (van thanh)) vi va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ((ve cam) or (va cham)) tuc ((van hanh) OR (van thanh)) vi va triet*".