Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
van lam » van nam
lam xuc » cam xuc, lam duoc
nang co » nang cao, nang doc, nang noi
luu tre » luu tru, cuu tre, luy tre
sac ky » cac ky, sai ky
vi luu » vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sac ky) or (sach y)) nang co hoc. hieu van lam xuc ((va hanh) or (va thanh)) vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sac ky) OR (sach y)) nang co hoc. hieu van lam xuc ((va hanh) OR (va thanh)) vi luu tre.
• Adding a wildcard symbol may retrieve word variants: doc ((sac ky) or (sach y)) nang co hoc. hieu van lam xuc ((va hanh) or (va thanh)) vi luu tre*.