Perhaps you should try some spelling variations:
ve triet » va trien, su triet
cham duc » pham duc, cham soc, phan duc
tru nang » tra nang, tri nang, truc nano
pham duy » pham duc
danh de » hanh de, dan de, dang de
va danh » va dinh, va dan, va hanh
tu sach » thu sach, te sach, tu cach
hien tu » khien tu, dien tu
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach

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

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