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