Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cua quoc » cua nuoc, cua thuoc
lang mai » lang dai, lang man, sang mai
lang hai » lang chai, lang thai, lang ha
vuc van » duc van, luc van, thuc van
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, xuc ban
ve cam » ve cham, ve cac, va cam

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 mai) or (lang hai)) khoi. hieu ve cam ((xuc van) OR (vuc van)) thanh vai cua quoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((lang mai) OR (lang hai)) khoi. hieu ve cam ((xuc van) OR (vuc van)) thanh vai cua quoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((lang mai) or (lang hai)) khoi. hieu ve cam ((xuc van) OR (vuc van)) thanh vai cua quoc".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((lang mai) or (lang hai)) khoi. hieu ve cam ((xuc van) OR (vuc van)) thanh vai cua quoc*.