Perhaps you should try some spelling variations:
thieu vien » thieu nien, thieu bien, thu vien
thu sach » thuat sach, thuoc sach, thu hoach
va hanh » van hanh, va thanh, va danh
cac dac » cac dan, cac dai, cac bac
cac duc » cac du, cao duc, cac nuoc
tu sach » su sach, te sach, tu cach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

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