Perhaps you should try some spelling variations:
pham duy » pham duc
tru nang » tra nang, tri nang, truc nano
cham duc » pham duc, cham soc, phan duc
su sach » so sach, vu sach
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
hieu vu » hieu va, hieu ve, hieu su
tu nang » tu nong, tu nano, tu lang
va cau » van cau, va cac, va dau
cau tu » dau tu, cau truc

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((tu nang) or (tru nang)) xa hoi. hieu vu ((cham duc) or (pham duy)) va tinh va cau tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tu nang) OR (tru nang)) xa hoi. hieu vu ((cham duc) OR (pham duy)) va tinh va cau tu.
• Adding a wildcard symbol may retrieve word variants: su sach ((tu nang) or (tru nang)) xa hoi. hieu vu ((cham duc) or (pham duy)) va tinh va cau tu*.