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
sach ty » sach y, sach tu, sach thu
lam xuc » cam xuc, lam duoc
van lam » van nam
nang xa » nang x, lang xa, nang ma
cu tren » tu tren, dua tren
sac ky » cac ky, sai ky
vi cu » vi su, vi xu, vi du

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 (sac ky)) nang xa hoi. hieu van lam xuc ((va hanh) or (va thanh)) vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sac ky)) nang xa hoi. hieu van lam xuc ((va hanh) OR (va thanh)) vi cu tren.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sac ky)) nang xa hoi. hieu van lam xuc ((va hanh) or (va thanh)) vi cu tren*.