Perhaps you should try some spelling variations:
chu treo » cau treo, cu tren, cau tren
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
hai chu » hai chau, hoi chu, hai chi
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
ly hang » ly quang
ly nang » ky nang, ly vang, ly quang
hieu va » lieu va
ma hoi » mai hoi, xa hoi, ma hoa

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 ((ly nang) or (ly hang)) ma hoi. ((hieu va) OR (hieu qua)) cam tuc van hanh hai chu treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly nang) OR (ly hang)) ma hoi. ((hieu va) OR (hieu qua)) cam tuc van hanh hai chu treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly nang) or (ly hang)) ma hoi. ((hieu va) OR (hieu qua)) cam tuc van hanh hai chu treo".
• Adding a wildcard symbol may retrieve word variants: su sach ((ly nang) or (ly hang)) ma hoi. ((hieu va) OR (hieu qua)) cam tuc van hanh hai chu treo*.