Perhaps you should try some spelling variations:
thieu bien » thieu nien, tieu bieu, hien bien
hanh vai » hanh vi, hanh va, hanh tai
bien cac » vien cac, dien cac, bien ca
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
sach ky » sach y, sach ty, sach kem
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sac ky)) ((nang xa) OR (lang xa)) hoi. thieu bien cac luc va hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) ((nang xa) OR (lang xa)) hoi. thieu bien cac luc va hanh vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sac ky)) ((nang xa) OR (lang xa)) hoi. thieu bien cac luc va hanh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sac ky)) ((nang xa) OR (lang xa)) hoi. thieu bien cac luc va hanh vai cua viet*.