Perhaps you should try some spelling variations:
phan duc » pham duc, phan tu, phan dau
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
cua tuc » cua thuoc, luat tuc, cua nuoc
duc van » duc va, duc tan, duc manh
te sach » toc sach
va phan » van phan, va phat, va phap
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cua duc » cua nuoc, cua quoc
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua su, cua cu, cua te

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 ty nang ma hoi. hieu va phan duc van hanh vi ((cua tu) or (((cua tuc) or (cua duc))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. hieu va phan duc van hanh vi ((cua tu) OR (((cua tuc) OR (cua duc)))).
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. hieu va phan duc van hanh vi ((cua tu) or (((cua tuc) or (cua duc))))*.