Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cham duc » pham duc, cham soc, pham duy
vu khac » vu kham, vu khanh, bui khac
khac ty » khac thi
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
tang ma » tang van
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khac ty ((tang ma) OR (mang may)) hoi. hieu vu cham duc ((va hanh) or (va thanh)) lam cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khac ty ((tang ma) OR (mang may)) hoi. hieu vu cham duc ((va hanh) OR (va thanh)) lam cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khac ty ((tang ma) OR (mang may)) hoi. hieu vu cham duc ((va hanh) or (va thanh)) lam cuu tre*".