Perhaps you should try some spelling variations:
hoang van » hang va
ky hoang » huy hoang, duy hoang, ky nang
cuu treo » cau treo, cu tren, cuu tao
su sach » so sach, vu sach
va lang » va nang, hoa lang
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
va dang » van dang, va nang, da dang
lam luc » lao luc, lam duoc
qua lam » cua lam, qua la, qua lao

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 ky hoang van hoa. hieu qua lam luc ((va dang) or (va lang)) dinh ((cuu treo) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky hoang van hoa. hieu qua lam luc ((va dang) OR (va lang)) dinh ((cuu treo) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky hoang van hoa. hieu qua lam luc ((va dang) or (va lang)) dinh ((cuu treo) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach ky hoang van hoa. hieu qua lam luc ((va dang) or (va lang)) dinh ((cuu treo) OR (cuu tre))*.