Perhaps you should try some spelling variations:
chau treo » cau treo, cau theo, chau tho
hieu van » hieu va, thien van, lieu va
cam truc » cau truc, nam truc, lam truoc
truc van » truc va, thuc van, truc ban
van dung » van dong, xay dung, tin dung
dung hai » dung tai, dung ha, dung sai
hai chau » lai chau, ha chau, hat chau
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
nang ma » tang ma, sang ma, mang may
van cam » van nam, van lam, van cau

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 ma) or (nang cao)) hoi. hieu van cam truc van dung hai chau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((nang ma) OR (nang cao)) hoi. hieu van cam truc van dung hai chau treo.
• Adding a wildcard symbol may retrieve word variants: su sach ly ((nang ma) or (nang cao)) hoi. hieu van cam truc van dung hai chau treo*.