Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh lap » thanh san, phan lap, thanh hai
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
duc van » duc va, duc tan, duc manh
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
lap va » tap va
thiet » thieu

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 (ve cac)) duc van thanh lap va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((ve cam) OR (ve cac)) duc van thanh lap va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ((ve cam) or (ve cac)) duc van thanh lap va thiet*.