Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue tang » thuc trang, thuy trang, thue trong
thai cua » than cua, tai cuc, tri cua
dau thai » dau thau, da thai, dao thai
te sach » toc sach
qua cac » cua cac
van hoe » van hoa, van hoc, van hieu
van hoi » van hoa, van hoc, van loi
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, xac va
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 thue tang ((van hoi) OR (van hoe)). hieu qua cac ((xuc va) or (luc va)) dau thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thue tang ((van hoi) OR (van hoe)). hieu qua cac ((xuc va) OR (luc va)) dau thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thue tang ((van hoi) OR (van hoe)). hieu qua cac ((xuc va) or (luc va)) dau thai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach thue tang ((van hoi) OR (van hoe)). hieu qua cac ((xuc va) or (luc va)) dau thai cua tre*.