Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
cau treo » cau theo, cau tren, cau triet
hieu van » hieu va, thien van, lieu va
lanh hai » manh hai, thanh hai, lang chai
truoc va » truc va, thuoc va, truong va
sang ma » tang ma, sang tao, mang may
sach ly » sach y, sach lo, sach ty
van lam » van nam
nang ma » tang ma, nang cao, mang may
va lanh » va lang, va danh, va hanh
hai cau » hai chau, hai chu, hai hau
su sach » so sach, vu sach

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 (sang ma)) hoi. hieu van lam truoc va lanh hai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((nang ma) OR (sang ma)) hoi. hieu van lam truoc va lanh hai cau treo.
• Adding a wildcard symbol may retrieve word variants: su sach ly ((nang ma) or (sang ma)) hoi. hieu van lam truoc va lanh hai cau treo*.