Perhaps you should try some spelling variations:
lang van » tang van, hoang van, giang van
dang van » hoang van, hang va
qua cham » qua hai, qua cac, va cham
cham tuc » nham thuc, pham thuc, tham thuc
vu hanh » vu khanh, vu thanh, du hanh
hanh ky » hanh kem
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu hanh ky ((lang van) or (dang van)) hoi. hieu qua cham tuc va hanh ((vi cua) or (hai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu hanh ky ((lang van) OR (dang van)) hoi. hieu qua cham tuc va hanh ((vi cua) OR (hai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: vu hanh ky ((lang van) or (dang van)) hoi. hieu qua cham tuc va hanh ((vi cua) or (hai cua)) triet*.