Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
hanh lam » thanh lap, hanh kem, hanh va
nam thuc » nam thuoc, am thuc, nam thu
cau treo » cau theo, cau tren, cau triet
lai hoa » dai hoa, loai hoc
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren
v nang » va nang, vu nang, van nang
y nang » ky nang, ly nang, may 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 tre) OR (cau treo))~.
• 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 tre) OR (cau treo)).
• 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 tre) OR (cau treo))".
• 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 tre) OR (cau treo))*.