Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
hanh lam » thanh lap, hanh kem, hanh va
lam cuu » lam chu, lam cua, cham cuu
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
dai hoa » dai khoa, dai hoc, dai hoi
y nang » ky nang, ly nang, may nang
va nay » va ngay, va cay
v nang » va nang, vu nang, van nang
va nam » van nam, ha nam

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