Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
chau treo » cau treo, cau theo, chau tho
hanh hai » thanh hai, nhanh hai, hang hai
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
nam xuc » cam xuc, nam xua, nam thuc

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 ((nang xa) OR (nang x)) hoi. hieu van nam xuc van ((hanh hai) or (thanh phan)) chau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang x)) hoi. hieu van nam xuc van ((hanh hai) OR (thanh phan)) chau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) OR (nang x)) hoi. hieu van nam xuc van ((hanh hai) or (thanh phan)) chau treo".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) OR (nang x)) hoi. hieu van nam xuc van ((hanh hai) or (thanh phan)) chau treo*.