Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
cua thuoc » nha thuoc, cay thuoc, cua nuoc
nang mai » nang ma, nang tai, lang mai
xuc ban » duc ban, cuc ban, quoc ban
cua tuc » cua duc, cua tu, luat tuc
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
luc van » luoc van, luu van, duc van
ve cac » va cac, vien cac

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 ty nang mai hoi. hieu ve cac ((luc van) or (xuc ban)) thanh lap ((cua tuc) OR (cua thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang mai hoi. hieu ve cac ((luc van) OR (xuc ban)) thanh lap ((cua tuc) OR (cua thuoc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang mai hoi. hieu ve cac ((luc van) or (xuc ban)) thanh lap ((cua tuc) OR (cua thuoc))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang mai hoi. hieu ve cac ((luc van) or (xuc ban)) thanh lap ((cua tuc) OR (cua thuoc))*.