Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach thu » sach thue, sach thieu, sach tham
va trien » va truyen, va tuyen, va tieng
vien cac » vien bach, vien dai, vien da
thu nang » thi nang, thu hang, thu bang
xuc van » duc van, luc van, vuc van
van anh » van thanh, tuan anh, van minh
anh kem » hanh kem, anh kiem, banh kem
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach thu nang x hoi. hieu ((ve cam) or (vien cac)) xuc van anh kem ((va trien) OR (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thu nang x hoi. hieu ((ve cam) OR (vien cac)) xuc van anh kem ((va trien) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach thu nang x hoi. hieu ((ve cam) or (vien cac)) xuc van anh kem ((va trien) OR (va thiet))".
• Adding a wildcard symbol may retrieve word variants: thu sach thu nang x hoi. hieu ((ve cam) or (vien cac)) xuc van anh kem ((va trien) OR (va thiet))*.