Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
danh vai » danh sai, danh va, doanh van
thu sac » thu san, thu xac, thu dac
cam duc » cam xuc, cao duc, pham duc
vai cua » dai cua, hai cua, lai cua
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu van
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
cua te » cua tu

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

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