Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
te sach » toc sach
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
hieu le » hieu ve, hieu he, hieu ly
le am » le ham, le nam, le a

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ky lang) OR (ky tang)) hoa hoi. hieu le am thuc van hanh ((vai cua) or (lai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky tang)) hoa hoi. hieu le am thuc van hanh ((vai cua) OR (lai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky tang)) hoa hoi. hieu le am thuc van hanh ((vai cua) or (lai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky tang)) hoa hoi. hieu le am thuc van hanh ((vai cua) or (lai cua)) triet*.