Perhaps you should try some spelling variations:
chu treo » cau treo, cu tren, cau tren
hanh hai » thanh hai, nhanh hai, hang hai
hieu van » hieu va, thien van, lieu va
hai chu » hai chau, hoi chu, hai chi
su sach » so sach
cao hoc » co hoc, cho hoc, chat hoc
ly nang » ky nang, ly hang, ly vang
vu sach » vu bach, vu khach
van cam » van nam, van lam, van cau
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc 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) or (vu sach)) ly nang cao hoc. hieu van cam ((xuc va) OR (tuc va)) hanh hai chu treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ly nang cao hoc. hieu van cam ((xuc va) OR (tuc va)) hanh hai chu treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ly nang cao hoc. hieu van cam ((xuc va) OR (tuc va)) hanh hai chu treo".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ly nang cao hoc. hieu van cam ((xuc va) OR (tuc va)) hanh hai chu treo*.