Perhaps you should try some spelling variations:
sach thien » sach thieu, sach tien, cach thien
thien bang » khien bang, thien ban, thien dang
cau treo » cau theo, cau tren, cau triet
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
va hanh » va thanh, va danh, ban hanh
su sach » so sach, vu sach
lam xuc » cam xuc, lam duoc
van lam » van nam
bang xa » lang xa, bang va, mang xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thien bang xa hoi. hieu van lam xuc ((va hanh) OR (van hanh)) vi ((dua tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thien bang xa hoi. hieu van lam xuc ((va hanh) OR (van hanh)) vi ((dua tren) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thien bang xa hoi. hieu van lam xuc ((va hanh) OR (van hanh)) vi ((dua tren) or (cau treo))".
• Adding a wildcard symbol may retrieve word variants: su sach thien bang xa hoi. hieu van lam xuc ((va hanh) OR (van hanh)) vi ((dua tren) or (cau treo))*.