Perhaps you should try some spelling variations:
lanh hoi » lanh hai, lanh voi, hanh thoi
hieu van » hieu va, thien van, lieu va
lam xuc » cam xuc, lam duoc
hoi cua » hoi chuc
sach tu » sach thu, cach tu, sach uu
nang xa » nang x, lang xa, mang xa
va lanh » va lang, va danh, va hanh
nang ma » tang ma, sang ma, nang cao
sach ty » sach y, sach thu, xach tay
van lam » van nam
xuc va » duc va, tuc va, luc va
cua su » qua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) OR (sach tu)) ((nang xa) or (nang ma)) hoi. hieu van lam xuc va lanh hoi cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) ((nang xa) OR (nang ma)) hoi. hieu van lam xuc va lanh hoi cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach tu)) ((nang xa) or (nang ma)) hoi. hieu van lam xuc va lanh hoi cua su".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach tu)) ((nang xa) or (nang ma)) hoi. hieu van lam xuc va lanh hoi cua su*.