Perhaps you should try some spelling variations:
lang xa » lang ha, dang xay, lang van
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
luu tre » luu tru, cuu tre, luy tre
te cac » tu cac, ve cac, te cao
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: te cac ky ((lang xa) or (tang ma)) hoi. hieu va cham ((luc van) or (duc van)) hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky ((lang xa) OR (tang ma)) hoi. hieu va cham ((luc van) OR (duc van)) hanh vi luu tre.
• Adding a wildcard symbol may retrieve word variants: te cac ky ((lang xa) or (tang ma)) hoi. hieu va cham ((luc van) or (duc van)) hanh vi luu tre*.