Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
vu khach » vu khanh, vu khac, vay khach
thuc van » thuc dan, thuc va, thuc hanh
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
dinh di » dinh du, dinh vi, danh di
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua
cua te » cua tu
va am » va lam, va cam

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) or (thuat san)) ky nang ma hoi. hieu va am ((thuc van) OR (thuc vat)) dinh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (thuat san)) ky nang ma hoi. hieu va am ((thuc van) OR (thuc vat)) dinh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu khach) or (thuat san)) ky nang ma hoi. hieu va am ((thuc van) OR (thuc vat)) dinh di cua te".
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (thuat san)) ky nang ma hoi. hieu va am ((thuc van) OR (thuc vat)) dinh di cua te*.