Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tay lang » tai lang, tay tang, tay quang
tu cach » tu cac
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
va cau » van cau, va cac, va dau
luc va » duc va, loc va
cua te » cua tu

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

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