Perhaps you should try some spelling variations:
thanh te » thanh ve, thanh de, thanh le
luoc van » luoc can, luoc va, luot van
kho tang » cao tang
thu xac » thau xay
luc van » luu van, duc van, luc va
cua tre » cua te, cuu tre, cua triet
hieu su » hieu sau, tieu su, hieu so
ky tang » ky nang, ky dang, ky trong
te cua » tue cua, le cua, de cua
su cam » su nam, su cao, su can

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu xac ((ky tang) OR (kho tang)) ha noi. hieu su cam ((luc van) or (luoc van)) thanh te cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu xac ((ky tang) OR (kho tang)) ha noi. hieu su cam ((luc van) OR (luoc van)) thanh te cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu xac ((ky tang) OR (kho tang)) ha noi. hieu su cam ((luc van) or (luoc van)) thanh te cua tre*".