Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thi nang » thi cong, ki nang, thi hanh
cham duc » pham duc, cham soc, pham duy
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, va hanh
vai cua » dai cua, bai cua, mai cua
hai cua » thai cua, dai cua, hoi cua
lai cua » dai cua, lai chau, thai cua

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

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