Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
cau tuc » cau truc, cau tu, cau luc
va hanh » van hanh, va thanh, va danh
tuc va » thuc va, truc va, tuc xa
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: tu sach tay lang xa hoi. ((hieu va) OR (hieu qua)) cau tuc va hanh ((vi cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tay lang xa hoi. ((hieu va) OR (hieu qua)) cau tuc va hanh ((vi cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tay lang xa hoi. ((hieu va) OR (hieu qua)) cau tuc va hanh ((vi cua) or (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu sach tay lang xa hoi. ((hieu va) OR (hieu qua)) cau tuc va hanh ((vi cua) or (dai cua)) te*.