Perhaps you should try some spelling variations:
tay quang » tac quang, tai quang, tao quang
pham duy » pham duc
tay tang » tay lang, tay trung, tay tieng
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
kem cua » em cua, keo cua, diem cua
hieu vu » hieu va, hieu ve, hieu su
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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 ((tay tang) OR (tay quang)) ma hoi. hieu vu ((cham soc) or (pham duy)) van hanh kem cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tay tang) OR (tay quang)) ma hoi. hieu vu ((cham soc) OR (pham duy)) van hanh kem cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tay tang) OR (tay quang)) ma hoi. hieu vu ((cham soc) or (pham duy)) van hanh kem cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((tay tang) OR (tay quang)) ma hoi. hieu vu ((cham soc) or (pham duy)) van hanh kem cua tre*.