Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cham duc » pham duc, cham soc, pham duy
vu khach » vu khanh, vu khac, vay khach
thanh vi » hanh vi, thanh va, thanh ve
vu sach » vu bach, su sach
cua tre » cua te, cua triet, dua tren
duc van » duc va, duc tan, duc manh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (vu khach)) ty nang xa hoi. hieu va cham duc van thanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ty nang xa hoi. hieu va cham duc van thanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) ty nang xa hoi. hieu va cham duc van thanh vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu khach)) ty nang xa hoi. hieu va cham duc van thanh vi ((cua tre) or (cuu tre))*.