Perhaps you should try some spelling variations:
pham duy » pham duc
tu sach » thu sach, su sach, tu cach
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, dieu vu
tinh ve » trinh ve, tinh ven, dinh ve
va tinh » may tinh
hieu su » hieu sau, tieu su, hieu so
ve cua » le cua, de cua, te cua
duy va » duy vat, duy van, day va
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: ((tu sach) or (te sach)) ky nang xa hoi. ((hieu vu) or (hieu su)) pham duy va tinh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang xa hoi. ((hieu vu) OR (hieu su)) pham duy va tinh ve cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang xa hoi. ((hieu vu) or (hieu su)) pham duy va tinh ve cua te*.