Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
cach tu » cach thuc
va danh » va dinh, va dan, va hanh
sach tu » sach thu, sach ty, sach uu
ve pham » vi pham, v pham, ve phan
cua te » cua tu
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sach tu) OR (cach tu)) nano ((xa hoi) or (o hai)). hieu ve pham duc va danh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach tu) OR (cach tu)) nano ((xa hoi) OR (o hai)). hieu ve pham duc va danh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach tu) OR (cach tu)) nano ((xa hoi) or (o hai)). hieu ve pham duc va danh vai cua te".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach tu) OR (cach tu)) nano ((xa hoi) or (o hai)). hieu ve pham duc va danh vai cua te*.