Perhaps you should try some spelling variations:
nam duoc » nam thuoc, da duoc, dat duoc
danh van » doanh van, dang van, dinh van
cua tre » cua te, cua triet, dua tren
va danh » va dinh, va dan, va hanh
duoc va » nuoc va, duc va, duoc ma
te sach » toc sach
thi van » thi lan, thi hanh, thi nang
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
cuu tre » cau tren, cau treo

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 ((ky lang) or (ky tang)) xa hoi. thi van nam duoc va danh van ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky tang)) xa hoi. thi van nam duoc va danh van ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) or (ky tang)) xa hoi. thi van nam duoc va danh van ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) or (ky tang)) xa hoi. thi van nam duoc va danh van ((cua tre) OR (cuu tre))*.