Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cham thuc » nham thuc, pham thuc, pham thuoc
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
vu sach » vu bach, su sach, vu khach
hoc cac » hoc cao
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 (hoc cac)) ky nang xa hoi. hieu ve ((cham thuc) OR (tham thuc)) va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (hoc cac)) ky nang xa hoi. hieu ve ((cham thuc) OR (tham thuc)) va thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (hoc cac)) ky nang xa hoi. hieu ve ((cham thuc) OR (tham thuc)) va thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (hoc cac)) ky nang xa hoi. hieu ve ((cham thuc) OR (tham thuc)) va thanh vi cua tre*.