Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
te sach » toc sach
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
hieu vo » hieu voi, hieu va, hieu ve
co thuc » do thuc, co thua, mo thuc
sach tu » sach thu, cach tu, sach ty
van hoc » van hoa
van hoi » van hoa, van hoe, van loi
tu tong » tu tuong, tu trong, tu dong

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 tu tong ((van hoi) OR (van hoc)). hieu vo co thuc dan hanh ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu tong ((van hoi) OR (van hoc)). hieu vo co thuc dan hanh ((vai cua) OR (lai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu tong ((van hoi) OR (van hoc)). hieu vo co thuc dan hanh ((vai cua) or (lai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu tong ((van hoi) OR (van hoc)). hieu vo co thuc dan hanh ((vai cua) or (lai cua)) tre*.