Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hien bach » vien bach, hien hanh, dien sach
tu sach » thu sach, su sach, te sach
lang va » lang van, hang va, lang ha
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
sach v » sach va, sach y, sach 2
xuc va » tuc va, luc va, xac va
v nang » va nang, vu nang, van nang
va cuu » va cau, va chu, va huu

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