Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam duoc » nam thuoc, da duoc, dat duoc
kem phat » te phat, de phat, tam phat
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
lam duc » lam duoc, lam dung, lang duc
va hanh » van hanh, va thanh, va danh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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: te sach v nang ma hoi. hieu van ((((lam duc) OR (pham duc))) or (nam duoc)) va hanh kem phat trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang ma hoi. hieu van ((((lam duc) OR (pham duc))) OR (nam duoc)) va hanh kem phat trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang ma hoi. hieu van ((((lam duc) OR (pham duc))) or (nam duoc)) va hanh kem phat trien".
• Adding a wildcard symbol may retrieve word variants: te sach v nang ma hoi. hieu van ((((lam duc) OR (pham duc))) or (nam duoc)) va hanh kem phat trien*.