Perhaps you should try some spelling variations:
thanh vien » nhan vien
phat thuc » phap thuc, pham thuc, phan thuc
thanh van » thanh san, thanh toan, thanh phan
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
lang ha » long ha
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

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 xa) or (lang ha)) hoi. lieu va phat thuc va ((thanh vien) OR (thanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (lang ha)) hoi. lieu va phat thuc va ((thanh vien) OR (thanh van)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) or (lang ha)) hoi. lieu va phat thuc va ((thanh vien) OR (thanh van)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (lang ha)) hoi. lieu va phat thuc va ((thanh vien) OR (thanh van)) cua tre*.