Perhaps you should try some spelling variations:
pham duy » pham duc
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
va danh » va dinh, dia danh, va thanh
va hanh » van hanh, va thanh, ban hanh
sach ly » sach y, sach lo, sach ty
cua tre » cua te, cuu tre, cua triet
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
ma hoi » mai hoi, xa hoi, ma hoa
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ly nang ma hoi. hieu va pham duy ((va hanh) or (((va danh) OR (va dan)))) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang ma hoi. hieu va pham duy ((va hanh) OR (((va danh) OR (va dan)))) hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang ma hoi. hieu va pham duy ((va hanh) or (((va danh) OR (va dan)))) hai cua tre*".