Perhaps you should try some spelling variations:
thien van » thi van
quan hai » quan ha, qua hai, quan tai
tuan hai » tuan khai, tran hai, tuan tai
tu sach » thu sach, su sach, te sach
duc van » duc va, duc tan, duc manh
lam duc » lam duoc, pham duc, nam duoc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
cuu tre » cua tre, cau tren, cau treo
y lang » o lang, _ lang, tay lang

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 y lang xa hoi. ((hieu va) or (thien van)) lam duc van ((tuan hai) OR (quan hai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. ((hieu va) OR (thien van)) lam duc van ((tuan hai) OR (quan hai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. ((hieu va) or (thien van)) lam duc van ((tuan hai) OR (quan hai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. ((hieu va) or (thien van)) lam duc van ((tuan hai) OR (quan hai)) cuu tre*.