Perhaps you should try some spelling variations:
chuan ted » chuan he
trinh van » trinh han, trinh quan, trinh toan
va trinh » van trinh, va tinh, lap trinh
pham duy » pham duc
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
chua tu » chu tu, cua tu, chua cu
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: su sach ty nang xa hoi. hieu va pham duy va trinh van ((((chuan ted) or (cua te))) or (chua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu va pham duy va trinh van ((((chuan ted) OR (cua te))) OR (chua tu)).
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu va pham duy va trinh van ((((chuan ted) or (cua te))) or (chua tu))*.