Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
vu khach » vu khanh, vu khac, vay khach
khach ty » sach ty
va thanh » gia thanh, va tinh, le thanh
cham duc » pham duc, cham soc, pham duy
lam cuu » lam chu, lam cua, cham cuu
va hanh » van hanh, va danh, ban hanh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
hang ma » hang va, hang ca, tang ma
ty hang » ly hang, ty xang, thi hang
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach ty hang ma hoi. hieu vu cham duc ((va hanh) or (((va thanh) or (ban thanh)))) lam cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ty hang ma hoi. hieu vu cham duc ((va hanh) OR (((va thanh) OR (ban thanh)))) lam cuu tre.
• Adding a wildcard symbol may retrieve word variants: vu khach ty hang ma hoi. hieu vu cham duc ((va hanh) or (((va thanh) or (ban thanh)))) lam cuu tre*.