Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
nam thuc » nam thuoc, am thuc, nam thu
cham cuu » cap cuu, chat cua
lam cuu » lam chu, lam cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
lai hoa » dai hoa, loai hoc
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
va nam » van nam, ha nam, va nay

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 ((y nang) or (v nang)) lai hoa. hieu va nam thuc va hanh ((lam cuu) OR (cham cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ((y nang) OR (v nang)) lai hoa. hieu va nam thuc va hanh ((lam cuu) OR (cham cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ((y nang) or (v nang)) lai hoa. hieu va nam thuc va hanh ((lam cuu) OR (cham cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: vu khach ((y nang) or (v nang)) lai hoa. hieu va nam thuc va hanh ((lam cuu) OR (cham cuu)) tre*.